If you would like, I could email you my cyber-crisis source. I used JEDI-SDL for my controls and other things and OpenGL for my graphics routines. I had all the code in to allow the player to run, jump and fall with varying gravity levels. I also added in platforms which you could jump down off of and ladders. I have no major plans for it now, but it could be of use to you if you want to check it out?