Melancholic Hunger & HUD

Amount of health that can be regenerated depends on the type of the currently held food item

You can't eat any more food when all the hearts are already regenerating

Slow health regeneration when eating only one food type

Health regenerates much faster when eating a diverse diet

Experience bar is hidden most of the time and appears when the player gains exp points

Experience bar is hidden most of the time and appears when the player opens their inventory or interacts with an enchanting table or an anvil