Needs polish
The game needs a bit more variety in attacks and it needs to be sped up. Double tapped arrows should make you dash, a few more death types etc.
also, surprisingly, kick isn't useless. Kicks can't be blocked, so if you start with a kick and jump as they get knocked up, you can hit them with an air combo without fear of a block or counterattack. You just have to do it fast enough because you can only hit them on the way up, once they start falling back down they can't be hit. I beat the 4 ninjas without taking a single hit like this.
Also, game needs an ending.