I finished it as well (platinum trophy and all) and all i can say is; fantastic
Going back and forth on the level design for a bit i was trying to figure out what their biggest inspiration for this game was. Someone here said Mario 3D World which after playing the first couple levels i was like "yeah okay i can see that." But after playing through it entirely? Honestly, the game gives me major Sunshine vibes with a lot of the levels having verticality to them and some of astro's powerups being straight up lifted from that game. The chicken is literally just the rocket nozzle by a different name, the penguin giving you the ability to speed through water like the speed nozzle, Astro's basic jump being a hover caused by shooting two beams into the ground to elevate him. Difference is i dug this game a lot where with sunshine...not so much lol.
This design choice also helps to seriously diversify the experience for the player. Each level essentially has its own gimmick to it and cleverly reuses said gimmicks. You might see the slo-mo power up multiple times, but it's never quite used in the same way. Biggest standouts are obviously the end levels of each world which are built in the image of specific Playstation games. They do a fantastic job of infusing whatever the big gimmick is in that game (like Kratos' leviathan axe or Aloy's bow combat) into this to the point i was so stunned at how natural it felt. "Oh this is a god of war level time to start throwing my axe...wait what?" type of thing.
Everything else, as stated is basically a big. cutesy love letter to playstation's history. Everything from the dumb inside jokes (Kratos' astro bot being referred to as "dad of boy" and the god of war level using BOI as a beat drop for the music) to the amount of games referenced. They got everything from the obvious first party sony stuff old and new like Crash, Spyro, and Jak to the new generation of heroes like Aloy, Nathan Drake and Ellie/Joel. Then there's the stuff that while not exclusive to Sony these days, it absolutely made its mark thanks to Playstation like Resident Evil, Tomb Raider, Tekken and Metal Gear Solid. Then there's the stupidly obscure/deep cuts which went way farther than i thought.
All in all, fantastic experience. Do recommend.