A very complete soundtrack, and I love the retro arcade vibes! Such a wide palette of sounds too, while still sounding cohesive. Great colab. Had a blast listening to it! Good stereo mixing too, the soundtrack sounds great with headphones, and it fits the theme well.
My only complaint would be the panning of the bass in the credits song: panning the bass to the left is an unconventional choice and not something that I entirely vibe with, although it does give me a "retro" feel (reminds me of some songs composed in soundchips that only allowed for full left channel, full right channel or both). Besides that, I have nothing to say really. Great job!