Pretty cool game. As someone who loves Survivor likes I had a good time with this. There's some room for balancing, because for the first minute or so there are very little level ups and little options, while in at some point you'll get level ups every second or so, which draws out the game immensly.
I think it would be smart to have a limit on the level ups, so you are creating builds rather than just getting everything. (would increase replayability)
Also spam clicking left mouse button gets tiring. :D
But! I really enjoyed playing this. Thanks.