Ooh, this is delightfully creepy! It's a pretty good ambient track. I really love all the different effects you added, like the static and those percussive hits around 2:48. Seriously, you have a very good instinct for details when you make songs like these in Cubase. Minimalism just isn't in your electronic music, it seems. :)
The thing about this song is that if it's going to be used as background music, there might be a little TOO much variation. Seeing as this is an ambient song, that normally wouldn't be a questionable thing, but for background music, you normally want the listeners to be able to listen to it without distraction from the game while the song still contributes to the ambience. Super-loud parts like 2:35 and 2:47, the loud static, the unconventional rhythmic parts at 1:30, and the soundlessness at the end all contribute to a really amazing ambient song that deserves 5 stars as a song itself, but I'm not too sure how it would be as background music. Knowing you, though... I'm sure you'll find a way to make it work!
Great job, LSD! Now that you've said it, you should definitely have a 'picking flowers' side objective in your game. If it's a puzzle game like your other two, you could have flowers in places that would be 'hard-to-find' alternate solutions, like stars in Cut the Rope. :P Can't wait for the game!