It was nice to play, I really liked the idea once I figured everything out. Though I must say instructions were unclear in the tutorial and I understood everything fully only when I started actually playing.
Design is nice, but cluttered. I think UI should be smaller so I can see how my dead character destroys all these poor enemies >:3
Also the game needs some juice, e.g. hitting animations, blood, some SFX of hitting, SFX of purchasing, you know.
It might be me, but the difficulty seemed to be quite high. I've bought all 6 upgrades for level 1 and yet it was difficult to understand what upgrades I really needed and where I should have saved money up.
Overall, it is a nice game that with more polish would get much better. It can be a very nice game for RPG lovers who also likes mobile games!