Really fun once you know how to play. Each enemy has its challenges, with the bats being themost annoying ones.
Here are my thoughts:
1.) The controls are weird. Would be nice to have more options like WASD as a control but I guess using Arrow Keys and X has its challenges.
2.) It should be made clear that you have to clear all enemies to open the door.
3.) Putting a 'D' button next to the save without any indication that it means 'Delete' and doesn't warn you after you press it is ... yeah. That should be fixed.
4.) The boss didn't look like it had taken damage and I got hit even when his fists are already going towards him.
5.) The boss' music going together with the death music once you die doesn't sound very good. I think only one of them should play when you die.
Overall, it could be a good platformer if this is polished. Loved the enemy types. Thanks for the game!