Amazing to say the least
You may not have gotten around to finishing or starting some of those songs but quite a few of them have alot of potential.
The most apparent and pleasing of which would be like the repeatedly suggested song that plays from 0:21 ~ 0:42. This song in particular I personally would like to see made and in full. Most of the newgrounds music fans would like to agree from the looks of it, so i think i can honestly say that on behalf of your fans you should definitely finish the song 0:21 ~ 0:42 and try to make it good!
0:06 ~ 0:20 is also pretty good and you should take some consideration of finishing that song. I however cannot say much about the song at the very beginning of this list.
0:58 ~ 1:13 was relatively good however there are better selections of the songs to finish.
2:20 ~ 2:49 was rather good and in a peaceful yet rythmatic way. it had a good feel to it. worth consideration of being completed.
5:32 ~ 5:59 was rather good as well however it would seem most suitable for a lab type of environment in a video game in my opinion, what you wish to do with that song is completley up to you.
And that is really about all i have to say about these songs. most of your heavy bass songs seem all too similar to be considered different songs in my opinion. so i suppose you could probably make 1 song using mixtures of them all ... maybe.