This looks amazing! Main character is really cute, I like how fast the animation is. Glow and CRT effect look beautiful and also the potions and generally the tiles - very nice looking game can only rate it 5/5 for graphics!
The gameplay is nice, but also a bit too simple. I think you have a really nice basis here, but you could have made more with it. Maybe 2 more enemies that have HP maybe or perhaps enemy filled rooms. It was overall too easy, I never lost more than 1 HP and there were too many potions to fill it up again.
But really, great game for a jam. Well done!
Edit: I had no lag at all playing in the browser.