Wow GenkiGenga! your game is very beautiful. I'm waiting for the final title screen because what I saw is very impressive.
I agree on some points with AJTilley. I had a lot of difficulty to understand the attack system. I will suggest in the final version to add a tutorial section where the player can try the attack system. It's seems very confusing at the beginning and I can assure you, I couldn't last very long.
If you can't add that, maybe add in the game screen a button that reminds you the different kind of attacks and how to use them.
You can be sure I will stay tuned bro. It looks very impressive.
Concerning the FPS, even if I have an old computer, I didn't notice any slowness. So everything is good on that side.