I agree with xiaoan about the compression. I felt this happened on all those parts in "My Favourites" that have drums.
I have a good thing to say: I like the fact you create short ideas and explore that. It's a good thing, even if someone says "it's repetitive sometimes" (and sometimes i felt it is), but I garantee you it's a good thing. Anyone who learns to explore short musical ideas, becomes great composer. But it takes time, praticing a lot, listening a lot, and learning a lot.
Besides the compression thing, the only comment (and I wouldn't even call it "negative") is that I couldn't figure out some of the variations in the songs. I think you focus on variation of notes (or phrases) when it's more efective to focus on "mood" variations (or climatic variations).
I might be saying a lot of crap.
Its difficult to me to express in english. But I think you have talent. Don't waste it ignoring all the stuff it's there for us to absorve. Go study, go listen, go learn. (-:
It seems I found another square wave lover.
I use that a lot.
The Sonic thing is another coincidence: actually, when I delivered the first songs for my first professional game soundtrack, the art director made a comment related to some new version of Sonic that was released that year. It is, of course, one of my influences.