I liked the concept. It was interesting having to switch between the 3 weapons to defeat the corresponding enemies. But some enemies, like the music notes, come at you at full speed! And in the end, I had to quickly switch the weapon, but you do this by clicking on the right icon. I think it would be better if you put a shortcut to select each weapon. And I died a lot of times because I couldn't see the platforms below me. A looking down function to the character would help a lot!
Congrats on your entry! ^^