I loved the pixel art and the VFX.
One thing I found a little annoying was the attack mechanic. Having to hold down the key to attack didn't feel very comfortable. Why not make it auto-attack instead? Or was that an intentional design choice?
The difficulty scaling also felt a bit off. I expected the game to gradually become more challenging, but it felt like I was being overwhelmed almost immediately.
Other than that, I think everything else was good.