Good start! I included it in my Godot Community Jam compilation video series, if you’d like to take a look. :)

Congratulations on your first Godot Project ! the execution looks very clean.
The gameplay reminds me of classic water levels in classic platformers, in which you had to manage your air meter... which were not very interesting ^^' sorry

It's a nice platformer where the player needs to maintain his heat up. The player is a little hard to see though, being such a small square and having a color that is relatively close to the background. Good job.