hi. sorry about that. the final product is supposed to automatically detect the input used by the player. so, if you are using keyboard, the tutorial will show "X" to jump instead of showing "A".
we thought the space key to jump is suitable for controlling with WASD. some platformer game like Celeste use C for jump. but sure, we will consider to add an option to rebind the keyboard keys. 😊
anyway, thank you for playing!