Amazing job on the four-color graphics, looked great, and everything including the text and HUD were still very clear. Sound was excellent too, I enjoyed playing it.
I found the firing animation to be a bit clunky, with it taking a moment to actually fire the projectile, and with me accidentally canceling it many times. Might have been nice to have a minimap, although the levels weren't too big. One minor thing, I was sad when I could stomp on the enemies with the mech and supplies would come out but I couldn't pick them up, lol.