via http://forum.gbadev.org/viewtopic.ph...e43f7b9ebfd846

My little demo, nothing fancy. You can jump around in 3d worlds, collect keys that open doors and shoot bullets that disintegrate as soon as they touch an object.

Fully tested on a real DS.

Controls:
A button - jumping
B button - shooting bullets
D-pad - movement

Screenshots:
http://sites.google.com/site/bl0ckeduserssoftware/clown3d-ds-screen1.PNG
http://sites.google.com/site/bl0ckeduserssoftware/clown3d-ds-screen2.PNG

Source code and compiled .NDS file download:
http://github.com/bl0ckeduser/clown3d-DS

Special thanks:
- mtheall for his technical support
- Dovoto for his example code, of which I copied several bits (with proper citations)
- devKitPro developers and forum

Enjoy!