Had a lot of fun playing the game! Quite hard to know what to do next, but my best tactic that shown maximum effeciency is - sniper, sniper, sniper, grenade, sniper (the sniper is just very overpowered). The 2 last ones I upgrade the most at the begining and the others later on. Good game!

This game is really easy to pick up and learn, and the design of the first few levels help with this. I do feel like there needs to be some warning on what's coming next though, because I found myself getting stuck really easily when I didn't have the right abilities

Simple rules, hard choices. I like it.

Very easy to pick up and play, interesting use of the theme and would certainly be a nice game if you continued development. 

Possibly add checkpoints as I found myself getting quite far  only to lose all progress because I happened to pick something that wouldn't help that level then dying.

If not checkpoints you could allow the player to see the level beforehand then decide based on a points system what abilities they need to take into the battle, allowing them to vary up their strategies during the game. 

Regardless, I would like to see this taken further it has potential.