Nice game! I really liked the different behaviours of hot and cold objects and how creatively they were used throughout the game
There were a few bugs, which I wont talk about since its a game jam, but there are also a few softlocks which I feel should be accounted for even if it was made in x amount of hours. Try to squeeze in a bit more playtesting next time!
The music also gets a bit annoying, especially combined with the jump sound
All in all though, really solid game!