Here's my playthrough!
(Sounds don't work properly on firefox, for best results use Chrome)
PLAY WITH THE ARROW KEYS
Sensei challenges you to knock all of the butterflies out of the air with nothing but your sword and your wits.
You can control yourself midair after you strike a butterfly, OR if your flying along the air. If you have nowhere else to fly you can always go back to the ground.
v1.1: Added a lives counter, this was a feature that was planned for initial release but I ran out of time. No gameplay changes beyond this already existing feature being represented in the GUI.
v2.0: (The ECCC / LCM patch). Fixed bug where butterflies would get caught on left or right edge of the screen. Also added feature where time briefly pauses when butterflies are hit.