Love me some old scool style game OST. This always will create some nostaliga. Paired with the more experimental nature of your OST this is just awesome. Reminds me very much of some game from Kira LLC.
Can't say much else then I really liked every ounce of wierd and wonderfull atmosphere you've created. Bravo!
Only critique I might give is the length. While I really liked the songs and sounds nearly 40min of music is maybe a bit to much :'D