I loved the visuals! I've been getting a little bit tired of ps1 horror, so seeing a non-horror ps1 style game is a breath of fresh air. You nailed the old school gameplay and aesthetic, and it gives me nostalgia. The cover art looks straight out of the 90's too!
I also loved the soundtrack. It definitely fit the style of the game, and it definitely made it feel more fast paced.
One thing I noticed was when you attack one enemy, the others of that enemy type flash red as if they got hurt too. Its not game breaking though, and its probably the only bug I've experienced in this game(if it is even a bug)
I would've liked to see a way to exit a mission if you accidentally selected the wrong one (I accidentally entered the tutorial when trying to get to the third mission), and maybe a dash mechanic, although I wouldn't call it necessary.