I really liked the art style of this game it was very eye-catching. Great start for your first game but here are some means of improvement:
1) Inconsistent pixel-scaling between some of the art is something that can break the immersion. If you don't know what I am talking about, try to keep all the pixels in your game the same relative size.
2) The gameplay felt a little slow, boring, and repetitive. This can be fixed by adding a dash mechanic or a faster attack speed.
Overall, the game is a success and I enjoyed the experience!