This is a pretty good game, but I feel like it needs a bit more to it to give it real playability. There is no significant difference between the levels, other than at some point they get much, much harder. There seems to be very little in the way of strategy or tactics to make much of difference, and there is no upgrade of leveling system with which to improve your char.
To me this made the game not really worth playing after the first few levels... I like to feel that there is something to keep playing for - at least a story line, even if not leveling....
But the game mechanincs are fun and new, and the graphics are nice, so this is still worth an 8 in my eyes.