Here are my thoughts on the more recent entries...
1 2 many - your biggest fan
Nice folky feel, and a good clear mix. Certainly ticks the box for being musically complete, this really feels like a whole song in 30 seconds without feeling at all rushed.
Bjulin - 30 Seconds to Alpha Omikron
A great spacey atmosphere, with a nice bit of musical tension introduced just before the climactic ending.
bzur - Snippet!
I like that subtle intro, before the heavy bass of the main theme kicks in. Interesting crushed ending too. The production feels generally very polished to me.
cheeso - Yes
Bold
DocJon - GoldfishInDaHood
Great! A complete song, and one that sticks in my head. Enjoyed this one for its music and its humour.
gorgorgathgorgorgor - Shut the Funk Up.
Very well-played bass. Clearly the bass is the focus of the track, but I felt I wanted something for it to be underpinning other than the organ playing octaves above it, if that makes any sense?
InboxZero - GetToThePointAlready
Well, this is quite a wall of sound! I think I would be able to appreciate it better if some of the sounds were a bit more separated, I found it all a bit overwhelming.
Irion - Da Ronin Saranghee Yo
Love those oriental sounds, and a nice mix. The end is a little abrupt, would have been nice just to have a second more reverb I think.
Liqih - eastim
Mmmmm, nice, very ethnic! In comparison with the other entries, this is noticeably bass-light until the final note - which is in some ways quite satisfying.
lowcloud - LowClouds
Nice piano sounds, well played, with tasteful sounds behind it too.
Mellotronaut - Believe
I liked the instrumentation of this track, nice and original. I found the words at the start a little bit indistinct, which is a shame as I feel they are the essence of the piece. But having read the lyrics they seem a lot clearer now, so maybe it's a psychological thing!
mikebenson - The Omniscient Narrator
Great sound, I like that vocal effect. The second part ends a bit abruptly, I feel this should be made into a full length track.
offthewall - 30something
An admirable concept, but I think the guitar parts needed to be somehow separated a bit more. But for 30 minutes of work - good result!
Peterhud - Yeah
This definitely needs to be a TV theme tune! Made me think of the Morecambe and Wise routine with Tom Jones ( from 5:30) - was that deliberate?
SLDMusic - Excelsior
Very different, and well done! Nice treatment on the vocals, particularly through headphones.
Vulcandj - TakeOff
Oh yes, some excellent guitar rock! Very professional sound, and very 'complete'. Great!