Cool game. A lil too easy tho. I got all the upgrades by level 10. The descriptions for the upgrades in game are the same for both paths on each unit. It'd be better if they specified what each path does. All in all a pretty fun td tho. 5/5.
Game seems to glitch when you upgrade elevators to final level. I switched to tubes and it worked fine except for a few workers that got stuck at their desks and were forced to work 24/7 making my money generation skyrocket into the millions. O.o looking past the glitches tho it's a pretty good game. 5/5