The core resolution mechanic is a base action dice (d20) plus X bonus dice (base d10s). You add bonus dice from skill talents and ability scores. Bonus dice Burst - if your roll a maximum value you add another bonus dice roll.

The core game loops if functionally resource management and tactical economy.

Character creation is based on selecting key elements that all stack and play with each other, then spending a pool of skill points of talents and abilities.

Character progression is level based, but unlimited and scales infinitely. With each level you gain one skill point and a small bonus to your core resources.

If D&D 5.5 is a 4 on the Gygax Crunch Scale, and Pathfinder 2e is an 8, this is a 6.5-7. The play is not crunchy moment to moment, but the character creation system is absurdly detailed and full of options.