- use in-game are to do the following actions: jump, duck, right left and
- 'P' to pause/unpause the game.
+ use in-game are to do the following actions: jump, duck, right, left, power
+ and 'P' to pause/unpause the game. I don't think there is anything to
+ explain about the others, but the power key, also called run, allow you
+ to run and use the power of the powerup you got. For instance, with the
+ fire flower, you can shoot bullets (note that this is the only power
+ currently implemented).