Asterook

The crash on the asteroid really hurt you. An exoskeleton is all that keeps you standing, however it is just a help, so with broken legs giving inputs is not a good idea. But you managed to save a grappling hook and a laser pistol from your shipwreck. One for each hand. The crash was so hard you now are in a deep cave-system in the comet you crashed on. It all is quiet, until you hear some weird noises and see some green being running towards you...

This game is played with just 2 keys, by default LMB (shoot the laser cannon) and RMB (shoot the grappling hook/hold to grapple towards it). It is a jump and run adventure with the twist that you cant jump... or run. Broken legs are not made for that kind of action.