> 3. After a few jumps on the bouncy mushroom, I fell through it. Is this intended?
Yes and no. The plan for them is to have some amount of "power" and when that is used up they need some cool-down before one can jump again.
Also, you fall out of that trampoline loop for example when you hit the ceiling.
What's really still missing is some animations for vertical movement. That will give you proper feedback that the player is not jumping anymore and just falling down. If you take a leap from the ledge above and just let yourself fall on the mushroom, you won't get pushed upwards, either. In order to get the jumping boost of it you have to actively jump onto it.
So, it works as designed, but is lacking feedback to the player. Jump animations is already on our list (and the graphics is already prepared).
