Nice little arcade game, fun to play for a few sessions. I haven't quite seen this exact gameplay premise anywhere else, and all types of the powerups were a nice and helpful addition (with Super Stacker powerup being particularly satisfying). It might not have as much *depth* as, say, "Neon of the dark Realm", but it easily makes up with a *high* amount of polish. Well done. ^^
Oh, and I strongly recommend learning how to setup an online hi-scores system. It really enhances games like these.