4/5 surprisingly addictive, quite cool and has lots of potential, maybe zoom in a bit. It just missed a 5/5 because you need more health and slightly quicker money income. Awesome game and want to see a sequel.
wave 151, fully upgraded and got so bored i gave up, 5/5, but needs more upgrades and the points were screwed. i ended up with like -1 all the time. too easy.