Thank you so much for the feedback! I agree that level is probably way too difficult, as you have to jump at the very end of the corner. It's something we'll change in future updates.
Only after that level apears the tree mechanic, which is just a tree which is bigger or smaller depending on the age and that has to be used to complete a couple levels. Anyway, nothing huge and up to that level you already saw the main concept of the game.
About the fast and slow timing, we'll add a fast forward button so that waiting isn't really waiting anymore and so the game doesn't feel so different in speed. We'll also take into account the hitbox!
Glad you liked it and thanks again for the comment!