The Amazon Appstore version of Sonic CD, which was completely rebuilt from the original game by Christian Whitehead, is now the free app of the day. This revamped game was redrawn with widescreen displays in mind, and it looks fantastic. It’s also got both the U.S. and Japanese soundtracks. OUYA owners will be glad to know that the game works flawlessly with the OUYA pad immediately and it controls perfectly as well. Anyone who grew up with Sonic CD will love the Android version, and getting this version lets you save a few bucks compared to the OUYA storefront version as well.