This is quite an interesting listen. I especially enjoy the chiptune sounds of "Platinum Boy's Space Adventure", it sounds like a Sega game from the 90's. The rest of the album is great as well, with a variety of genres exemplifying the best of video game music.
This is right up there with the Streets of Rage soundtrack for me. Top notch.
Favorite track: Platinum Boy's Space Adventure - プラチナボーイのスペースアドベンチャー Demo Title Screen １９９３.