E to shoot grapple and Spacebar to launch towards it (best done in midair). Always face right when launching your grappling hook, but you can face any direction when swinging.
Shift to dash
Attacks
Ctrl (Control) to melee
X to blast
Other
P to pause or resume and O to enter or exit Photo Mode.
V to look through walls and windows
M to mute music and U to unmute
L to view the leaderboard at any time. It scores based on the coins you collect!