Hi,
I am working on a Metroid Fusion based game,
I implemented fall and collision detection + movement. The game
is hosted here : http://code.google.com/p/asteris/
Source code etc. Tarballs are here : http://code.google.com/p/asteris/downloads/list
https://dl.dropbox.com/u/100062163/pics/asteris-screenshot3.png
Enjoy!