the first one was really catchy. From the intro to the end. That was my favorite one. I also like the beginning of the 3rd. Though I thought it ended too abruptly.
First I'd like to ask are these are all WIPs? If they aren't I realllllyyyyy recommend u make a full song out of them, especially the first one and the 3rd one. Those have alot of potential to be longer. So do the other ones. I understand they are segments of a song, but they all feel incomplete. The composure is decent, and it sounds good on midi (assuming that you are using midi.
Anywho, yeah keep it up.
Please contact me if you would like to use this in a project. We can discuss the details.