builds on its predecessor in every conceivable way, including its progression systems. Like, is a roguelike game. Players go through it in "" — each time they spawn, they complete as much of the game as they can until they run up against a wall and their character dies.
They then start the Cycle again from scratch, only this time, they find themselves in an entirely new procedurally generated world, with new challenges to face and new upgrades to gain.
But in order to ensure players are reliably able to complete the game, implements a variety of different progression systems to ensure the player character gets increasingly stronger over time.
There are those that apply only within an individual Cycle, those that apply across runs, those that affect your character, and those that affect the world around them.
Learning to use them is an important factor in powering up custom characters over time, and eventually ensuring that continued progress through the game is feasible.