Arrow keys or WASD to move

Arrow Keys to move the menu around to get to the arrows and the map

Click to fire

R to Restart

Click on the quiver to show an arrow, then click accept or decline to add the arrow to your inventory or not.

The greyed-out arrows on the side show if they are in your inventory or not and also can be clicked on to remove the arrow from your list.

'Bugs'

There is a jump that you cannot make, it's possible because double-jumping is enabled.

G is still the cheat.