Incredible art and sprite work here! I made it to the ice ring during my furthest run, and I really enjoyed navigating the depths of both the mines and the volcano on my way there. While I thought the majority of the gameplay was fair, I found the collisions for both some of the enemies and the environment to be really punishing—I'd be curious to see how it'd play with one-way platforms as others have called out too as it'd make the platforming a lot more accessible in some of the rooms. I'll come back again later to finish it out after I've had a chance to play more jam games. Thanks for making and sharing your game!