diff --git a/src/components/DownloadButton.tsx b/src/components/DownloadButton.tsx
index c031820..1895b33 100644
--- a/src/components/DownloadButton.tsx
+++ b/src/components/DownloadButton.tsx
@@ -8,7 +8,7 @@ export default function DownloadButton({
   return (
     <button
       onClick={onClick}
-      className="px-4 py-2 bg-green-500 text-white font-semibold rounded-md hover:bg-green-600 focus:outline-none focus:ring-2 focus:ring-green-500 focus:ring-opacity-50"
+      className="px-4 py-2 bg-gradient-to-b from-green-500 to-green-600 text-white rounded-md hover:from-green-500 hover:to-green-700 transition-all duration-200 border border-green-600 shadow-sm hover:shadow-md text-shadow"
     >
       Download
     </button>
diff --git a/src/components/Downloader.tsx b/src/components/Downloader.tsx
index 75f8d33..cbffbd4 100644
--- a/src/components/Downloader.tsx
+++ b/src/components/Downloader.tsx
@@ -11,6 +11,7 @@ import StopButton from './StopButton'
 import ProgressBar from './ProgressBar'
 import TitleText from './TitleText'
 import ReturnHome from './ReturnHome'
+import { pluralize } from '../utils/pluralize'
 
 interface FileInfo {
   fileName: string
@@ -29,7 +30,9 @@ export function DownloadComplete({
 }): JSX.Element {
   return (
     <>
-      <TitleText>You downloaded {filesInfo.length} files.</TitleText>
+      <TitleText>
+        You downloaded {pluralize(filesInfo.length, 'file', 'files')}.
+      </TitleText>
       <div className="flex flex-col space-y-5 w-full">
         <UploadFileList files={filesInfo} />
         <div className="w-full">
@@ -55,14 +58,16 @@ export function DownloadInProgress({
   return (
     <>
       <TitleText>
-        You are about to start downloading {filesInfo.length} files.
+        You are downloading {pluralize(filesInfo.length, 'file', 'files')}.
       </TitleText>
       <div className="flex flex-col space-y-5 w-full">
         <UploadFileList files={filesInfo} />
         <div className="w-full">
           <ProgressBar value={bytesDownloaded} max={totalSize} />
         </div>
-        <StopButton onClick={onStop} isDownloading />
+        <div className="flex justify-center w-full">
+          <StopButton onClick={onStop} isDownloading />
+        </div>
       </div>
     </>
   )
@@ -78,7 +83,8 @@ export function ReadyToDownload({
   return (
     <>
       <TitleText>
-        You are about to start downloading {filesInfo.length} files.
+        You are about to start downloading{' '}
+        {pluralize(filesInfo.length, 'file', 'files')}.
       </TitleText>
       <div className="flex flex-col space-y-5 w-full">
         <UploadFileList files={filesInfo} />
@@ -106,9 +112,7 @@ export function PasswordEntry({
 
   return (
     <>
-      <TitleText>
-        {errorMessage || 'This download requires a password.'}
-      </TitleText>
+      <TitleText>This download requires a password.</TitleText>
       <div className="flex flex-col space-y-5 w-full">
         <form
           action="#"
@@ -127,6 +131,14 @@ export function PasswordEntry({
           </div>
         </form>
       </div>
+      {errorMessage && (
+        <div
+          className="bg-red-100 border border-red-400 text-red-700 px-4 py-3 rounded relative"
+          role="alert"
+        >
+          <span className="block sm:inline">{errorMessage}</span>
+        </div>
+      )}
     </>
   )
 }
diff --git a/src/components/InputLabel.tsx b/src/components/InputLabel.tsx
index 1f383a6..8a5549e 100644
--- a/src/components/InputLabel.tsx
+++ b/src/components/InputLabel.tsx
@@ -2,11 +2,17 @@ import React from 'react'
 
 export default function InputLabel({
   children,
+  hasError = false,
 }: {
   children: React.ReactNode
+  hasError?: boolean
 }): JSX.Element {
   return (
-    <label className="text-[10px] text-stone-400 mb-0.5 font-bold">
+    <label
+      className={`text-[10px] mb-0.5 font-bold ${
+        hasError ? 'text-red-500' : 'text-stone-400'
+      }`}
+    >
       {children}
     </label>
   )
diff --git a/src/components/PasswordField.tsx b/src/components/PasswordField.tsx
index 0175104..3223696 100644
--- a/src/components/PasswordField.tsx
+++ b/src/components/PasswordField.tsx
@@ -1,7 +1,12 @@
 import React, { useCallback } from 'react'
 import InputLabel from './InputLabel'
 
-export default function PasswordField(props: {
+export default function PasswordField({
+  value,
+  onChange,
+  isRequired = false,
+  isInvalid = false,
+}: {
   value: string
   onChange: (v: string) => void
   isRequired?: boolean
@@ -9,24 +14,24 @@ export default function PasswordField(props: {
 }): JSX.Element {
   const handleChange = useCallback(
     function (e: React.ChangeEvent<HTMLInputElement>): void {
-      props.onChange(e.target.value)
+      onChange(e.target.value)
     },
-    [props.onChange],
+    [onChange],
   )
 
   return (
     <div className="flex flex-col w-full">
-      <InputLabel>
-        {props.isRequired ? 'Password' : 'Password (optional)'}
+      <InputLabel hasError={isInvalid}>
+        {isRequired ? 'Password' : 'Password (optional)'}
       </InputLabel>
       <input
         autoFocus
         type="password"
         className={`w-full px-3 py-2 border rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 ${
-          props.isInvalid ? 'border-red-500' : 'border-stone-300'
+          isInvalid ? 'border-red-500' : 'border-stone-300'
         }`}
         placeholder="Enter a secret password for this FilePizza..."
-        value={props.value}
+        value={value}
         onChange={handleChange}
       />
     </div>
diff --git a/src/components/StartButton.tsx b/src/components/StartButton.tsx
index 7beb376..800cb3c 100644
--- a/src/components/StartButton.tsx
+++ b/src/components/StartButton.tsx
@@ -8,7 +8,7 @@ export default function StartButton({
   return (
     <button
       onClick={onClick}
-      className="px-4 py-2 bg-green-500 text-white rounded-md hover:bg-green-600 transition-colors duration-200"
+      className="px-4 py-2 bg-gradient-to-b from-green-500 to-green-600 text-white rounded-md hover:from-green-500 hover:to-green-700 transition-all duration-200 border border-green-600 shadow-sm hover:shadow-md text-shadow"
     >
       Start
     </button>
diff --git a/src/components/UnlockButton.tsx b/src/components/UnlockButton.tsx
index 39c54ba..b185c7a 100644
--- a/src/components/UnlockButton.tsx
+++ b/src/components/UnlockButton.tsx
@@ -4,11 +4,11 @@ export default function UnlockButton({
   onClick,
 }: {
   onClick?: React.MouseEventHandler<HTMLButtonElement>
-}): React.ReactElement {
+}): JSX.Element {
   return (
     <button
       onClick={onClick}
-      className="px-4 py-2 bg-green-500 text-white rounded-md hover:bg-green-600 transition-colors duration-200"
+      className="px-4 py-2 bg-gradient-to-b from-green-500 to-green-600 text-white rounded-md hover:from-green-500 hover:to-green-700 transition-all duration-200 border border-green-600 shadow-sm hover:shadow-md text-shadow"
     >
       Unlock
     </button>
diff --git a/src/hooks/useDownloader.ts b/src/hooks/useDownloader.ts
index 0c0b1b2..68db586 100644
--- a/src/hooks/useDownloader.ts
+++ b/src/hooks/useDownloader.ts
@@ -37,7 +37,6 @@ export function useDownloader(uploaderPeerID: string): {
   bytesDownloaded: number
 } {
   const peer = useWebRTC()
-  const [password, setPassword] = useState('')
   const [dataConnection, setDataConnection] = useState<DataConnection | null>(
     null,
   )
@@ -50,11 +49,11 @@ export function useDownloader(uploaderPeerID: string): {
     ((message: z.infer<typeof ChunkMessage>) => void) | null
   >(null)
   const [isConnected, setIsConnected] = useState(false)
-  const [isDownloading, setDownloading] = useState(false)
+  const [isPasswordRequired, setIsPasswordRequired] = useState(false)
+  const [isDownloading, setIsDownloading] = useState(false)
   const [isDone, setDone] = useState(false)
   const [bytesDownloaded, setBytesDownloaded] = useState(0)
   const [errorMessage, setErrorMessage] = useState<string | null>(null)
-  const [isPasswordRequired, setIsPasswordRequired] = useState(false)
 
   useEffect(() => {
     const conn = peer.connect(uploaderPeerID, { reliable: true })
@@ -79,6 +78,7 @@ export function useDownloader(uploaderPeerID: string): {
         switch (message.type) {
           case MessageType.PasswordRequired:
             setIsPasswordRequired(true)
+            if (message.errorMessage) setErrorMessage(message.errorMessage)
             break
           case MessageType.Info:
             setFilesInfo(message.files)
@@ -100,7 +100,7 @@ export function useDownloader(uploaderPeerID: string): {
     const handleClose = () => {
       setDataConnection(null)
       setIsConnected(false)
-      setDownloading(false)
+      setIsDownloading(false)
     }
 
     const handleError = (err: Error) => {
@@ -124,7 +124,7 @@ export function useDownloader(uploaderPeerID: string): {
       conn.off('close', handleClose)
       peer.off('error', handleError)
     }
-  }, [peer, password, uploaderPeerID])
+  }, [peer, uploaderPeerID])
 
   const submitPassword = useCallback(
     (pass: string) => {
@@ -134,12 +134,12 @@ export function useDownloader(uploaderPeerID: string): {
         password: pass,
       } as z.infer<typeof Message>)
     },
-    [dataConnection, password],
+    [dataConnection],
   )
 
   const startDownload = useCallback(() => {
     if (!filesInfo || !dataConnection) return
-    setDownloading(true)
+    setIsDownloading(true)
 
     const fileStreamByPath: Record<
       string,
@@ -213,8 +213,23 @@ export function useDownloader(uploaderPeerID: string): {
   }, [dataConnection, filesInfo])
 
   const stopDownload = useCallback(() => {
-    // TODO(@kern): Implement me
-  }, [])
+    // TODO(@kern): Continue here with stop / pause logic
+    if (dataConnection) {
+      dataConnection.send({ type: MessageType.Pause } as z.infer<
+        typeof Message
+      >)
+      dataConnection.close()
+    }
+    setIsDownloading(false)
+    setDone(false)
+    setBytesDownloaded(0)
+    setErrorMessage(null)
+    // fileStreams.forEach((stream) => stream.cancel())
+    // fileStreams.length = 0
+    // Object.values(fileStreamByPath).forEach((stream) => stream.cancel())
+    // Object.keys(fileStreamByPath).forEach((key) => delete fileStreamByPath[key])
+    //   }, [dataConnection, fileStreams, fileStreamByPath])
+  }, [dataConnection])
 
   return {
     filesInfo,
diff --git a/src/hooks/useUploaderConnections.ts b/src/hooks/useUploaderConnections.ts
index 27b944d..3a64610 100644
--- a/src/hooks/useUploaderConnections.ts
+++ b/src/hooks/useUploaderConnections.ts
@@ -57,13 +57,19 @@ export function useUploaderConnections(
           const message = decodeMessage(data)
           switch (message.type) {
             case MessageType.RequestInfo: {
+              const newConnectionState = {
+                browserName: message.browserName,
+                browserVersion: message.browserVersion,
+                osName: message.osName,
+                osVersion: message.osVersion,
+                mobileVendor: message.mobileVendor,
+                mobileModel: message.mobileModel,
+              }
+
               if (password) {
-                // TODO(@kern): Check password
                 const request: Message = {
-                  type: MessageType.Error,
-                  error: 'Invalid password',
+                  type: MessageType.PasswordRequired,
                 }
-
                 conn.send(request)
 
                 updateConnection((draft) => {
@@ -73,13 +79,8 @@ export function useUploaderConnections(
 
                   return {
                     ...draft,
-                    status: UploaderConnectionStatus.InvalidPassword,
-                    browserName: message.browserName,
-                    browserVersion: message.browserVersion,
-                    osName: message.osName,
-                    osVersion: message.osVersion,
-                    mobileVendor: message.mobileVendor,
-                    mobileModel: message.mobileModel,
+                    ...newConnectionState,
+                    status: UploaderConnectionStatus.Authenticating,
                   }
                 })
 
@@ -93,13 +94,8 @@ export function useUploaderConnections(
 
                 return {
                   ...draft,
+                  ...newConnectionState,
                   status: UploaderConnectionStatus.Paused,
-                  browserName: message.browserName,
-                  browserVersion: message.browserVersion,
-                  osName: message.osName,
-                  osVersion: message.osVersion,
-                  mobileVendor: message.mobileVendor,
-                  mobileModel: message.mobileModel,
                 }
               })
 
@@ -120,6 +116,57 @@ export function useUploaderConnections(
               break
             }
 
+            case MessageType.UsePassword: {
+              const { password: submittedPassword } = message
+              if (submittedPassword === password) {
+                updateConnection((draft) => {
+                  if (
+                    draft.status !== UploaderConnectionStatus.Authenticating
+                  ) {
+                    return draft
+                  }
+
+                  return {
+                    ...draft,
+                    status: UploaderConnectionStatus.Paused,
+                  }
+                })
+
+                const fileInfo = files.map((f) => ({
+                  fileName: getFileName(f),
+                  size: f.size,
+                  type: f.type,
+                }))
+
+                const request: Message = {
+                  type: MessageType.Info,
+                  files: fileInfo,
+                }
+
+                conn.send(request)
+              } else {
+                updateConnection((draft) => {
+                  if (
+                    draft.status !== UploaderConnectionStatus.Authenticating
+                  ) {
+                    return draft
+                  }
+
+                  return {
+                    ...draft,
+                    status: UploaderConnectionStatus.InvalidPassword,
+                  }
+                })
+
+                const request: Message = {
+                  type: MessageType.PasswordRequired,
+                  errorMessage: 'Invalid password',
+                }
+                conn.send(request)
+              }
+              break
+            }
+
             case MessageType.Start: {
               const fileName = message.fileName
               let offset = message.offset
diff --git a/src/messages.ts b/src/messages.ts
index 826202a..b7b3033 100644
--- a/src/messages.ts
+++ b/src/messages.ts
@@ -57,6 +57,7 @@ export const ErrorMessage = z.object({
 
 export const PasswordRequiredMessage = z.object({
   type: z.literal(MessageType.PasswordRequired),
+  errorMessage: z.string().optional(),
 })
 
 export const UsePasswordMessage = z.object({
diff --git a/src/types.ts b/src/types.ts
index 17a5ef2..973331e 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -7,6 +7,7 @@ export enum UploaderConnectionStatus {
   Paused = 'PAUSED',
   Uploading = 'UPLOADING',
   Done = 'DONE',
+  Authenticating = 'AUTHENTICATING',
   InvalidPassword = 'INVALID_PASSWORD',
   Closed = 'CLOSED',
 }
diff --git a/src/utils/pluralize.ts b/src/utils/pluralize.ts
new file mode 100644
index 0000000..9b6b499
--- /dev/null
+++ b/src/utils/pluralize.ts
@@ -0,0 +1,7 @@
+export function pluralize(
+  count: number,
+  singular: string,
+  plural: string,
+): string {
+  return `${count} ${count === 1 ? singular : plural}`
+}