Retro/Grade, an Independent Games Festival nominee for best game design, is making its way off of PSN ... we mean, onto PSN. See, the thing that makes this shmup different is that all the action happens backwards -- like a classic space shooter meets Memento. Comparison can also be made between this game and WiiWare's Bit.Trip.
There's a long writeup of the game over at the PlayStation Blog. One of the cooler things implemented in the title is the use of a guitar controller to control the ship. The fret buttons will allow the player to move, while the strum bar is used as the "shoot" button. You can get an idea of what it'll look like in the video after the break.