A few complaints:
1) I'd like to see more challenge. I didn't die at all, and I only used the wings once. I only felt challenged through level 25. After that, I never got hit more than once by any enemy eexcept the final boss.
2) Artifacts don't scale with level. I'm at level 97 getting the same artifacts I got at level 8.
3) Magic was totally worthless. I never had a battle to use any spells, and my weapon did more damage anyway. the only spell I ever used was heal, and I was only trying to save potions.
4) Giant frogs???
That said, I did enjoy this game. It was totally addicting, and I just couldn't walk away.