Gameplay is bland and requires no skill. Stopped palying at lvl 8 because I just could not take it anymore.
Would have given 2/5, but those buttons at the bottom costed you 1 point.
If anything, some of the minions are pretty overpowered. The guys with 50% dodge chance... well, let's say in a game i was about to get perfect rating, then one of these came in, dodged -all- my attacks and grabbed the gem. Making it dodge 1 of every 2 attacks seems a less RNG-y way to achieve what you want.
And ninjas... well. 5 Seconds of invulnerability is too much