What a hilarious, cute, and fun concept! I love the game. I was able to kill the 'good guy boss' without getting to the $800 upgrade, as I was able to spread the spawners around, then pile them at one corner, where only 2-4 turrets would be defending while the others would be occupied. If I had to say one thing, it would be the desire for crazier obstacles, harder turrets, and more money for faster upgrades (you know how attention spans can be). I wish there was more!! Honestly graphics are super cute, and I love the retro-isometric-3D style. Nice work.