Looking for comments on how to make my music better!

Hello, folks! This is my first time posting on this forum, but I'm really excited to let people listen to my music and offer their (constructive) criticism. I'm committed to getting better, to having a good portfolio of electronic sounds, and to getting a gig writing music for indie games. Here are the links to some songs:

http://soundcloud.com/isaac-smith-9/herbie-vore
http://soundcloud.com/isaac-smith-9/invasion
http://soundcloud.com/isaac-smith-9/painicillin

Let me know what you think, and please, any helpful hints or opinions you have are more than welcome. Thanks!