Yeah, it's really easy to port (it compiled first attempt after adding a makefile for the GP2X). If I get a spare hour tomorrow, I'll fix up the controls for the GP2X...
If you take the zip file, unzip it to your SD card's root directory, then run sdlscav on your GP2X you'll see the start screen. Press B to go. L and R dig left and right respectively. Start suicides. Sound deliberately nailed since my headphone socket died. Completing a level looks like it hangs for a while, but it's just saving your progress to the SD card. Chill.