Wow, this is such a grind and in no way enjoyable. There's only like, 6-8 dungeons so you start repeating very quickly. The bosses are a joke (just walk up to them and mash attack until they die). It's actually faster to run through dungeons to the exit than to actually kill things.
Changed my review to 1/5, it's stupid to be told "defend some base" and the guys can in 2 turns run inside the base which causes a loss, even if you can massacre them afterwards.
Meh, most of the puzzles were annoying rather than interesting (like the inverted climb, where if you messed up you had to start over). Save points are outdated and unnecessary, just respawn us from right before we died. Also, wasd controls, how does every game not have wasd controls?
Buggy - Dead bodies absorb bullets and explosions kill even after they're done exploding. Like others have said, once you buy the grenade tosser you may as well do something else while the level runs. I'm literally writing this review while the level goes and I'll beat it without taking damage.
I didn't like a couple of levels because I felt like the solution was some game mechanic I wasn't told about. However, this game concept is unique and very well done and I'm looking forward to the next one. Perhaps you could make a level editor?