We've been getting an ample release of good homebrew application and games recently, and its all thanks to the current NEO Compo 2008 event. Last time we had a cool MS-DOS-style file browser for the DS, and this time we have Sushi Rubik, a virtual Rubik cube game for the PSP.

Aside from the usual cube-twisting action, homebrew developing team teamsushi's Sushi Rubik offers a lot of other features, which are enumerated below:

3x3x3 classic Rubik's Cube simulator
default controls can update all but back face without rotating, with two alternate sets of controls.
undo/redo all moves
save/load current cube in progress
timed challenge from a scrambled cube, and freestyle solving modes
recorded high scores for timed challenge, compare with your best time
beginners solution style autosolve
4 visualizations of cube state for a background
estimate of moves remaining for a beginner's solution
animated rotations
works in French or English

If you want to get straightforward Rubik cube gameplay for your PSP without the bulky cube, then go ahead and pick up the game from the download link below. Make sure to go over the readme file first before attempting to install the game. Enjoy!