If I can give you a tip: When using pixel images in Godot, (re)import them as '2D Pixel' under the 'Import' -> 'Preset' tab, so you can have clean pixel sprites in your game :)
I love how you interpreted the theme! And the game itself is well made, too! I think an indicator where you exactly land after jumping would be nice, the first times I jumped directly into the lava ^^"
Incredible how you made this game in the short amount of time! I wish there would be some music for adapting the flipping rhythm to :D Nevertheless, great work! :)