Whoa, this was super fun! The graphics were very charming and the colors were nice! I'm not sure if it was intentional, but in the later levels, most of the time, I didn't know which switch corresponded to which items. I was just shooting at the switches randomly and hoping that one of them set off the piece I needed. It wasn't so confusing that I felt it hurt my experience, and I could understand if this was a deliberate design choice. In the case that it wasn't, or you plan on adding more types of switches and items in the future, I think having the switches have a differing pattern that corresponded to the item they're linked to would go a long way in communicating what they did. Other than that, the game was the right amount of difficult and I beat the boss by the skin of my teeth! Nice game!