I made PSP homebrew game which was cheap and simple again.
Do not hit a wall, and forword.
You can choose "3D Version" and "2D Version".
"3D Version" is time attack race game.
"2D Version" is very retro taste.
It is made with SDL + PSPGL.
http://www.fumi2kick.com/pspapp/
http://www.fumi2kick.com/pspapp/tcgs...bin_061130.zip
http://www.fumi2kick.com/pspapp/tcgs...src_061130.zip