A fun, simple game! I liked the mechanics and thought the difficulty curve for each wave was just right. The upgrades, as well as having to preserve both health and ammo, made for some fun strategizing that really elevated the game. The only thing I'd improve about this game is that I would make it easier to tell which enemies were real and which were fake, in order to give players the ability to better choose when to use their blue bar attack. Even so, great work on a very fun entry!