The art and logo are really charming and have a great retro aesthetics. I see and appreciate the effort and love that went into this game! But I do have some feedback π
The music was nice, but the jump and hit sfx were a bit harsh on the ears and needed to be tuned down a bit.
It's quite difficult to control the character. Acceleration and friction need to be a lot greater than now, so the player reaches the maximum speed a lot faster and goes to 0 a lot faster, too. Jump could be finetuned to that as well.
The attack animation was a bit glitchy, especially when jumping, and I think the animation should start without delay when clicking. It was also a bit difficult to get into a position in which I can successfully attack enemies, especially if there were a bit lower than me - my character instantly landed on their heads, etc. I think the player shouldn't be lifted in the air when hit too.
I think the player shouldn't collide with their summons, too, as it was a bit difficult to fight enemies when they're blocked by them.
To sum it up, if you improve the collisions and movement, and make the sfx a bit softer, it'll really enhance the experience of the game.