Cool little arcade game! Kinda standard, but I still had fun exploding tons of enemies/bosses and watching all of the effects go crazy. Only complaints I had were 1) bosses were really feast-or-famine; you either destroyed them completely with power-ups or you get annihilated without power-ups, 2) some mechanics aren't explained too great, like the healing squares and level progression, and 3) the noise/vibrations just get way too intense at times; consider applying vibrations to only special instances.