For https://itch.io/jam/godot-wild-jam-5

Either Mouse Input. Point and click where the mushroom will jump away from the mouse (away so you don't click of the screen) and R to reload from checkpoint.

Or Controller (Recommended but not limited other wise) Left control stick to aim, To jump is A for xbox or X for playstation. And to reload from checkpoint, X on xbox or Square on playstation.

Some sound credits: 

https://opengameart.org/content/water-splashes
https://opengameart.org/content/swamp-environment-audio