Illinois John

Controls:
w - jump
a, d - move left and right
space - Throw rocks

Help Illinois John traverse through the creature-infested caves by stomping on your enemies, throwing rocks, or having them parish in lava. Collect all of the gems to exit each stage, and look out for the boss, Skullio*, to escape the cave and collect the biggest gem of them all.

*Hint* his weakness is only lava.