Not bad. Mini map needs to show the actual rooms you've been through and the lay out of those rooms so you can figure out where you have and haven't been in those rooms. Not just a box showing the level layout. Kinda boring. Could be bigger. Hard to see. I like the dark but everything is too small.
Nice concept but too easy. Not much variation in creeps. Keep all elevator slots filled. Always buy elevators when they become available. Upgrade to lasers as soon as possible. Keep your elevators evenly upgraded.
Bit too easy. Especially with the turrets. Maxed out my turret spots, added 4 turrets then went away for 30 minutes. Came back, bought a bunch of super soldiers and won very easily.