All Powers
Press X, X, F, E, Tab, F.
All Powers Upgraded
Press Tab, click Mouse Wheel, Tab, E, X, E.
Full Ammo
Click Mouse Wheel, Space, Tab, Tab, F, X.
Full Arrowheads
Press Space, click Mouse Wheel t, E, F, Left Mouse Button.
Full Lives
Press Tab, E, E, X, Space, click Mouse Wheel.
Global Items
Click Mouse Wheel, X, E, E, Right Mouse Button, Tab, F.