Soundcloud has quite a few nice features, but a free account limits you to 2 hours of music in total. If that's not an issue, go with Soundcloud! It's awesome.
If, on the other hand, you want to upload a ton of stuff,
Tindeck is a good site. There's a 10mb limit per file and no overall cap.
I'm pressed for time right now so I'll just comment on one of your songs, Chippy Chips.
It's very heavy on the panning oscillators and the bitcrush effect (not sure if that's the technical term). I like it from 1:15 to the end, but the stuff before that is all over the place. Basically (and this is still something I'm struggling with) the main melody of your song should LEAP OUT at the listener and say "CHECK ME OUT, I'M AWESOME." There's no single trick to doing that, but just keep an eye out. Or an ear out.