Fantastic job! There's a lot of content in this game given the timeframe the jam took place. Lots of levels with nice puzzles. I really like how you used the temperature and used that mechanic creatively to get each level's puzzle to stand out. I also liked the lava lamp effect in the main menu's background.
Only nit-pick I can think of is the jumping off walls is pretty finicky. I ended up switching temperatures inside vertical blocks to hoist me up higher since it forces the player character upward, and that's how I managed to clear some of the levels that relied on the wall jump mechanic. Otherwise stellar job with all of this! Probably the easiest 5-star game I've seen so far.