I think it’s a bug because from the start I tried jumping on the enemies (even the bats) but I don’t bounce :/
I keep falling…

Im happy you got it now :)
I was thinking maybe I should have a quick tutorial at the beginning (or just an explanation on the itch page), but then I was like "Well, it's a small game that once you get isn't very difficult, so lets atleast keep the player interested for more than a minute.". Annoyance > content.