Po-Han Lin has just released Ceres v1.1.  the game is free, but you can donate to unlock additional features in the game.  Here is an excerpt for the readme:CERES is a classic space shooting game similar to the "Asteroids" arcade game, but has its own unique features.  If you like the game please "HOLD DOWN LEFT SHOULDER BUTTON" when in the game, and make a monetary donation.  Registered users get special unlocked versions of the game with secret items like smart bombs.  If you want to see more programs like this, show your support.  In this version, he has converted the game over to the PSPSDK, and merged some agenaworld code.

You can get it in our PSP Download section [here].