The default controls are arrow keys to move, and 12345 for abilities. In the bottom-right corner, it shows the abilities that you have. Press 1 to use the abilty furthest to the left (heal). Press 2 to use the ability second-furthest to the left (sword). Press 3 to use the ability in the middle (invisibility). Press 2 to use the ability second-furthest to the right (dash), and press 5 to use the ability furthest to the right (ninja stars). I made this game a while ago so it isn't the best.