The limitations of the levels stole away a lot of the potential for creative victories and removed a lot of the challenge by having too many obviously wrong answers.
Not a lot of thinking involved.
Quite fun, I haven't been engaged by a game on this website in sometime.
There was even a point where I thought there would be an upgrade to fix a glitch that was some nuisance, but nope.
On that note you should keep look for the upgrades getting stuck on the "Play" button and not being able to pull them off.
I played the game only on the atari mode until wave 20, the upgraded versions get easier.
Great game. good feel.
Feels unnecessarily long with few changes in strategy, tedious game-play, even. Found myself the majority of time browsing the internet for a few minutes while my army won the battle.