Cool game!
Though it has a couple bugs, lemme list some of them so you can fix it!
1. When you interact with the mushroom from the sides it just spams the sfx but does nothing, would suggest checking if the player is ON the mushroom instead of checking if the playing TOUCHES the mushroom
2. I fell into the void on Level 3, but didnt died. I would suggest placing spikes there as bellow the map is not viewable by the camera.