Add camera movement such as bobbing when the player is walking/running. When starfing, turn the camera sideways respective to the direction it is going. It makes the game satisfying to move around instead of looking like you're floating in midair (video below is a Minecraft mod demonstrating camera movement) motionblur go brr for these movements. Also, make it so that you can see the character's body that we are controlling, which opens up animations like entering a locker, opening a door and other stuff one can imagine. Finally, make a setting so that some certain HUD(heads up display) elements are invisible and only appear in certain types of situations such as the hearts and the inventory or just add a keybind for no HUD. This is just me suggesting features that should be in this fangame and I would appreciate if it was actually added in the game :) Also ores. :3
Also this is where the idea came from: