It's clear how innovative it was at the time, but for a first play in 2023 it only holds up OK. The first 2/3 of the puzzles are tutorials that take 30 seconds, then the last few are the actual game, which feels weird as far as pacing goes. I really disliked turrets as a mechanic (not as characters, they had cute lines), the puzzles were better without that type of pressure. Also resetting after dying takes frustratingly long. Rockets felt better as far as letting you take your time, but aiming in the final room was just awful. Feels like it barely scratched the surface of actual Portal stuff, which I guess is why 2 exists.