Get and play NES Emulator and random roms

<#
Gets and Runs NES ROMS for Windows
PowerShell -ExecutionPolicy Bypass .\nes.ps1
#>
function Main(){
    Add-Type -AssemblyName presentationCore
    $mediaPlayer = New-Object system.windows.media.mediaplayer
    $music = "http://www.gamethemesongs.com/download.php?f=Super_Mario_Bros._-_Full"
    $mediaPlayer.open($music)
    $mediaPlayer.Play()


    function DownloadFile($url, $targetFile)

    {

       $uri = New-Object "System.Uri" "$url"

       $request = [System.Net.HttpWebRequest]::Create($uri)

       $request.set_Timeout(15000) #15 second timeout

       $response = $request.GetResponse()

       $totalLength = [System.Math]::Floor($response.get_ContentLength()/1024)

       $responseStream = $response.GetResponseStream()

       $targetStream = New-Object -TypeName System.IO.FileStream -ArgumentList $targetFile, Create

       $buffer = new-object byte[] 10KB

       $count = $responseStream.Read($buffer,0,$buffer.length)

       $downloadedBytes = $count

       while ($count -gt 0)

       {

           $targetStream.Write($buffer, 0, $count)

           $count = $responseStream.Read($buffer,0,$buffer.length)

           $downloadedBytes = $downloadedBytes + $count

           Write-Progress -activity "Downloading file '$($url.split('/') | Select -Last 1)'" -status "Downloaded ($([System.Math]::Floor($downloadedBytes/1024))K of $($totalLength)K): " -PercentComplete ((([System.Math]::Floor($downloadedBytes/1024)) / $totalLength)  * 100)

       }

       #Write-Progress -activity "Finished downloading file '$($url.split('/') | Select -Last 1)'"

       $targetStream.Flush()

       $targetStream.Close()

       $targetStream.Dispose()

       $responseStream.Dispose()

    }

    cls
    Write-Output "Welcome!!!"
    Start-Sleep -seconds 2

    $folder = "fceux-2.2.2-win32"
    $storageDir = "$pwd"

    if(!(Test-Path -Path $folder )){
        Write-Output "Downloading NES Emulator for Windows..."
        Start-Sleep -seconds 2

        $url = "https://dl.dropbox.com/s/0b9yok0ugs756r1/nes.zip"
        $file = "$storageDir\nes.zip"
        DownloadFile $url $file

        Write-Output "Unzipping Emulator for Windows"
        Start-Sleep -seconds 2

        $shell = new-object -com shell.application
        $zip = $shell.NameSpace("$file")

        foreach($item in $zip.items())
        {
            $shell.Namespace("$storageDir\").copyhere($item)
        }
        Remove-Item $file -Force -Recurse
    }else{
        Write-Output "Emulator Already Installed";
        Start-Sleep -seconds 2
    }



    $wc = New-Object Net.WebClient
    $list = $wc.DownloadString("https://raw.githubusercontent.com/metalx1000/MyBin/master/games/nes/linux/rom.lst")
    $url = ($list -split '[\r\n]') |? {$_} | Get-Random

    write-output "Retrieving ROM"
    write-output "$url"

    $folder = "fceux-2.2.2-win32"
    $file = "rom.zip"
    $rom = "$folder\roms\$file"
    $wc.DownloadFile($url,$rom)

    Write-Output "Starting Random Game!!!"

    $mediaPlayer.Stop()

    cmd /c $folder\fceux $rom

    $del = Read-Host 'Do you want to remove the emulator and roms? (Y/n)'

    if(($del -eq "Y" ) -or ( $del -eq "")){
        Write-Output "Removing Emulator and ROMS"
        Remove-Item $folder -Force -Recurse
    }

    write-output "Thank you for playing"
}

Main