Brilliant game, I loved the level design and the game theme, Selecting game difictulty before play was a great feature as well, Also the music in the game is also beautiful.
The following are the only drawbacks, which I believe you can fix or improve in future releases:
1- The attack feels tedious and repetitive, adding an impact to enemies as well as the player when they are hit would be fantastic feature.
2- Smoothing the transition between frames in animations is advisable, Current system gives impression the game is lagging.
3- It would be favorable if the player could shoot shurikens, as archers can be harsh in some locations.
Congratulations to you and the rest of the team.