Arcade game:
platform game- demo shows barbarian going around, enemies with spears, and a tarzan-swing-over-lava screen where he drops onto a ledge and the wall starts to push him so he will fall in the lava.
c64 games:
platform game- guy in space suit runs and jumps around, i think inside buildings, can get different weapons. kinda bland colors. that's all i can remember. not megaman.
platform game- you are this thing with a spring on it's butt and boxing gloves. kinda like the enemy in bubble bobble. really bright and electric level graphics.
edit: thanks for helping me find the spring game above, "thing bounces back".
thanks