Gary and The Attack of the Brain-Eating Shape Shifters from Mars

Gary and The Attack of the Brain-Eating Shape Shifters from Mars game information:

You must defeat the aliens by gathering up their source of power slushies. This is how you complete the levels.

How to play:

O / Left Arrow Key - Move Left.
P / Right Arrow Key - Move Right.
Q / Up Arrow Key - Up Ladder.
A - Down Arrow Key - Down Ladder.
Spacebar - Jump.
Z / Alt Key - Attack.