Everything great about Sonic Adventure 2 is represented here functionally (movement and jumping that feels good when the camera is behaving, big levels with various routes through them, the way that it follows a racing game-esque progression where later levels are more about picking the spots to not go full-speed on) and aesthetically (butt rock with on-the-nose lyrics at pivotal moments, a dope-ass super saiyan final boss fight). Doesn't really have the budget or manpower to get all the way there - and struggles to find a reason to keep the combat mechanics from the first game - but damn does it get close, especially considering it was largely made by one guy.