Ok game...needs better control explanation (k is jump, not attack; w and s only work when flying; u only pushes enemies away), need to be able to defend yourself other than jumping or flying over the head of your enemies, and finally it sucks when you get a sword guy on each side and there's nothing you can do but get smacked back and forth between the two...
Game definitely needs an option to go back and play old levels. I would love to go back to world 1 after getting lots of upgrades and getting nearly 100% on each level!
Game controls can be very unresponsive and can really frustrate when it costs lives. Need to show how many upgrades you get per level. Thought I got three hammers on a lvl and really only got two.