I liked the visuals also showing the character running. I had some issues with fighting the enemy and also jumping. Seems there is no jump implemented like in Celeste even if it seems so when you slowly slide down the wall but cannot jump again.
I noticed also you get something when you fight the enemy but happened only on the top one. The lower one nothing happened beside myself loosing health. Furthermore it would be good to keep the enemy between boundaries. I had a case where the upper enemy was going to the left and then fell down until both enemies were at the bottom of the level (running in opposite directions while I was on the platform above).
Nevertheless nice implementation for a first game.