This was a lot of fun! I beat all the bosses, I liked their variety and the fights were fun. Since the whole game is a lot of tunnels, gates, and switches, there were times when I got kind of lost, but it's fine. The music fit the game really well, and I really liked all the abilities and having to equip different ones. I think it would be cool to relate the abilities to the boss fights: for example, you have to do something with ice to damage the first boss, fire for the 2nd, and both for the final boss, but the way you have them here is just fine. I loved the art, seeing all these pixel art animations is very inspiring!