Steam now offers Rush Bros., featuring a 10% discount on the musical platformer between now and June 1st. Here's word on the game:

Rush Bros is a pulse-pounding, music infused Platform Racing Game that features a single player and a competitive multiplayer either split-screen local or online between two simultaneous racers. Rush through over 40 unique levels jam-packed with puzzles, obstacles and power-ups in a race to the finish line where the victor can literally crush his competition.