Excellent! I love the sound of your music. The trill passage is fantastic (the Cosmic Clock), and the fact that you add instruments as you go along sounds really good.
For Tricky goes to Town, I wonder if you know André Rieu the Dutch composer. The arrangement and chords are very similar. This music was a big hit in France a few years ago.
As for the last one, there's a touch of Nobuo Uematsu in your composition that I really like.
All in all, I have nothing to say except that it's very good orchestral music that would go very well in a game.
PS: Can you tell me how you did it? It sounds like a clarinet on E and a flute trill on C and D?
