Keyboard controls are as follows:
- W,A,S,D or arrows = move
- Ctrl = attack
- Space = jump
- 'E' while moving = roll
- 'E' while stationary = pickup log/chair, or drop what you are holding
- F = Special mushroom power
- Sprint = tap shift while moving left/right, or double-tap left/right
Advanced moves:
- Sprint then 'E' = slide
- Sprint then 'Ctrl' = lunge
- Sprint then 'Space' then 'E' while in air = ground pound
- Ctrl + Space = back attack
There's a help menu in-game as well. Upper right-corner button ('?') in the title screen.