You're not alone, the level has been mentioned in these comments before and it involves alerting the player from far away. There's also a skip level button in the settings menu if you still can't figure it out
It's fine, i don't want to spoil any of the puzzles here but if you can beat some later level i think it more than makes up for the one you skipped ツ. That's what the skip button is for anyway
To avoid spoilers to future players also stuck in this level, the tree alerts the 'player' in a 'cross' shape on where it fell. The cross shape spans the whole level and can also scare the player through obstacles. (I guess this is also true for the fire)
Exactly, you explained it better than I did. For the game, the sound waves were all i had time to implement but perhaps a future update could make that a bit clearer
