Probably the biggest criticism I have of this game is information denied to the player.
On one hand, this means that I got lost in some levels, uncertain if I was supposed to go up or down or left or what. Not sure how to make that clearer, but the game has a pretty strict time limit, so getting lost seems like a problem.
On the other hand, it means that arrows or flyers coming in from offscreen when you're at that edge of the screen are very annoying, and that the camera should probably stick a bit closer to the player character.
(Also, the rope-climbing animation is really jarring, especially compared to the quality of the hero's other animations—especially the attack animation, that one's really good. But, you know, game jams—I'm sure an animation would have been added if there was time.)