A nice platforming experience! I liked the idea of different environments having different temperatures, and the changing music and backgrounds helped convey that very well. The different doors and platforms also helped add some nice variety and challenge to the game. I'm not really one for difficult games, but I still would've liked it if it was a bit more challenging, though - a lot of my time was just spent moving right, and I didn't really feel that affected by the changing temperatures. Some of the platforming felt a little clunky as well, but it was nothing game-breaking, and I still got through in the end.
The art was really nice, and I especially liked how the environment changed as you went through the game. The player's sprite was pleasing too, and the animations were a nice touch. The backgrounds were a bit blurry, though, and they did cut off at the edges as well, which took away from the experience a little. The sound effects and music were good, and the little footstep noises were a small, but charming little addition - and they added some nice auditory feedback to the game!
This platformer was a fun little adventure, and it has some interesting ideas to use - well done on making it!