Looking for a painfully difficult physics game for your Windows Phone? Take a look at Daredevil Mouse.
This multi-level game has you controlling a mouse through multiple jumps to get a piece of cheese. Daredevil Mouse is a game where you send your mouse, encased in a hamster ball, through a series of jumps, twists and twirls to snag a piece of cheese. The multi-level game isn't for the faint of heart (either that or I'm really bad at this game) and while the challenge can be frustrating, it also seems to draw you back to the game.