great idea but...
serious balancing issues need to be addressed. At this point, the game is basically powering up twice, attacking, and repeating. None of the other skills seem to be at all useful and defense seems to be largely ineffective. Also, the 500 damage cap really hinders your ability to hurt higher level enemies.
Maybe everyone is complaining for a reason... this game isn't just hard, it's boring. Please take peoples' criticisms and improve this game. Thanks.