Thank you for feedback!
> I didn't find the debug option, unfortunately.
That's... unfortunate, perhaps I didn't make it intuitive enough to discover. It's in the final room of Frozen North location. The game ending with the pedestal is just a red herring; there is a graphical "glitch" in a corner of the prize room that you're supposed to enter and unlock the second half of the game.
> the movement felt a bit difficult
Yeah, it can take some time to get used to. I tried experimenting with a zoomed-out fast-moving feel inspired by Super Meat Boy, and use a split-room camera instead of the usual follow camera. It worked out great in some situations, but maybe not so in cases where precision is needed.
> The music was good as well.
Thank you, it was my first foray into soundtrack design, was tons of fun!