Pixel art is great and I like the instructiveness you put for the main title screen. Here is some feedback if you'd like!
- I noticed the UI button for the start is in front of the cursor art, it may be beneficial to change the priority or move the layers around.
- Some of the UI you used still has a little bilinear filtering on it, try setting this to point in the editor on your sprite and they should look a lot crispier
- Overall I think the gameplay loop is super nice, the enemies feel nice and combat feels natural. Maybe some more screen shake would be nice when being hit or hitting.
- Smooth camera control would be good, if you aren't already Cinemachine is a great way to implement easily modular camera control that has smoothing applied so it feels a little smoother when following your player, it would be useful to look ahead of the player when moving and then return back to the center smoothly when you're standing still.
Great work overall! Definitely a great use of the limitation and you implemented the theme well.