This mod adds a basic RPG system to the game (XP, level-up and skills)
New ways to deal with enemies, be it attack or defense.
Armors or armor equipment.
Damage Stat doesn't appear to work?
The description says it buffs 'player damage'. I didn't test melee damage, but gun damage is unchanged. I'm assuming it wasn't meant to be a melee damage buff since the icon is a cannon shell.