to beat wave hard on twenty first build a rocket and upgrade damage all the way, then focus on building two blue turrets and upgrading them all the way, put these blue turrets behind your red turret with less than a turret space between, and make sure your rocket hits enemies first.
for lvl 29...just figured it out... stack ur triangle so that the longest side is down at the top of the invisible bar. Then put a triangle to the right of the point. You should put this on in a position so that it looks like the top left hand of a sandwich cut diagonally.
well, this game was kind of good, but too short, too repetitive, and tons of minor flaws break the experience down into a button masher...its truly sad, because this couldve been an exceptionally fun game. 4 stars for what could've been.
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