Very well drawn! I was taken by surprise by the bunny's mouth at the end.
It took me some time to notice the health bar at the top and there was no other feedback if I am dealing damage. Using a more contrasting or bright color for the bar might have helped or a different sound between swinging and hitting.
Just an idea for the controls: if you have SHIFT for attack and SPACE for dash you can use those in both WASD mode and arrows mode