Hey thanks so much for playing the game and writing this review! this is some really good feedback and I think its going to help me make some improvements!
the idea is you have a module, and you'll collect / craft more in the game and improve the amount of slots they have. The power baubles are like materia from ff7 mixed with items from risk of rain 2. They have effects and or status changes that get activated all at once when the module activates. When you equip it to a slot, that slot corresponds to the action that triggers it.
Thats the concept anyway, still a long ways to go, and of course making a tutorial for that is gonna be gnarly