Big fan of the soundfonts used in this one. I love the idea of stylizing the soundtrack after the type of game you'd find in a bargain bin - that is really clever, and each of the pieces does a great job of matching this kind of vibe. Can't quite put my finger why that is specifically, but it just works. Some really memorable melodies here, and the bass-work is great. Often an under-stated part of retro games, so due respect paid where relevant.
I think of the bunch, the Title and Menu Theme are my favorites - they just have this sauce to them. I feel like I'd stumble across them in some random retro-games playlist and then find myself researching the game out of curiosity. Super solid work, really enjoyed listening to these!