Ok.. played this through level 4 on normal. Haven't lost one single battle so far... I really don't see what's so overpowered about the enemy. Yeah, they have like infinite armies and resources.. but christ, they're still an AI. Use your brain.
Okay.. great idea, terrible execution. Also, the insane amount of lag on boss levels makes this unplayable, and yes, I set the settings to 'Unlimited'. I died about 5 seconds in to the level 20 boss because I was lagging too bad to shoot or control my movement.
Very fun, just needs a group select, and a way to fast-forward the waves. And, like others also said, a wider selection of towers. Or perhaps just more unique and useful towers, and less straight damage.
Frankielikes, jump over the button, and move the safe on the ground directly under the safe in the air. Press the button, and then push the bottom safe out from under the top safe so it squishes you =D
Built 3 supply drones, fully upgraded Refinement + One upgrade to damage, then wiped out the enemy base with 2 cruisers and a silo with about 400 extra ore at the end.
Somehow the huge menu screen got stuck so that I couldnt close it, and so I had to restart the game to play again.. unfortunately, I couldn't save because of the massive menu, so I had to redo like 20 minutes of work. -.- Great game otherwise, so 4/5!