Hope you're not insulted or something. Game was pretty fun and I felt that it ended just at the moment things started to get really exiting. An idea worth a sequel. Or declare whole thing as "demo" and make it four times longer! I think you'll find loads of fans to this one.
btw, I saw your background and gave a little tip to help you at drawing in perspective. Perspective was and will be the biggest problem for amateurs, but there's lots of tricks to come around it.
Don't underestimate yourself - your background was pretty fine.