Looks like we have some eagle-eye readers out there like Beshoy, who noticed on the official Windows Phone Facebook page a sneak-peak at Sonic 4.
We've known since February that Sonic the Hedgehog 4 Episode 1 (also on Xbox 360) was coming to Windows Phone 7. The classic platform game is part of the big-title push coming in April to our beloved OS, which includes Angry Birds and Doodle Jump, amongst others.
Anyways, if you head to the Facebook demo page and hit the Xbox LIVE button, you'll be treated to some very brief gameplay of Sonic in action. It's what you expect it to be as it looks just like the console port that you can get now. We're certainly curious about how in-game controls work for this title and are hoping for the best as you really just can't beat some old Sonic, now can you?
Source: Windows Phone Facebook (demos); Thanks, Beshoy, for the tip!