The movement is fast and snappy, the controls are responsive and the goal is clear in every level. Most of the time you have to juggle items and its more about throwing stuff correctly than platforming or puzzle solving, not something im fond of to be honest and even though i didnt die i failed a lot of the times because the jump boots where key most of the time and loosing them means being stuck. I would try to re-do the level design in order to not rely so much on the boots and focus on puzzles or platforming.
Theme, you only have one item equipped at all times although throwing them over and over is the same as having them all but only more cumbersome, it stills fits the theme but in my opinion it hurts the game.
Originality, the one slot has been done quite a lot but the power ups are original and the level design is built around them.