Well it felt slow from the start of the game. I guess it was because of the background because it moved very slowly along side the long distance between enemy's and obstacles. the final boss was easy as I just had to spam the R attack. and the fact you have a death sound and particle effect is more then most beginners use. most beginners just have the enemy disappear and maybe a small death sound or something. you should study game feel more. hope this was helpful to you and good luck on your game and future games!
-RexTGun