Very nice game
Firstly, graphics were brilliant, they had a real storybook feel to them, well animated too, some creative enemy designs :D
All the backgrounds were beautiful, some more interesting ground texture would have been nice though, as well as foreground objects, trees grass maybe?
Gameplay wise, everything worked well, though the stamina factor didn't do anything for adding strategy to the game, it rather resulted in long waits in between moving along. Not really necessary. There could have been more interactive elements in the levels too, rather than just boxes and chests - the falling rubble in the later level was a great example of what Im talking about, possibly a similar scenario with a river or something? The platform element of the game could have been so much more. The mouse avoider minigames were a great touch though, good thinking on that one.
I also felt it was lacking slightly upgrade wise. If you are going to have an upgrade shop, stock it with more than 3 items, possibly some sheilds to go as well, or just dont bother with the shop and have weapons as hidden items to find in each stage.
Still on the note of shops, a couple didn't work when I pressed "E" outside of them (no "Closed" sign either) which was strange.
Apart from that, combat was fine, similar to Bob the BArbarian, but unique characteristics noted. The boomerange guy was good : )
What more can I say? Top stuff! But you should at least consider a sequal for the sake of many potential improvements :D