Alrighty then

criticism it is.
Generosity's Reward:
This one was good. Your instruments seemed to be a bit off beat from each other, I'm not exactly sure if that's one instrument or one, and the drums sounded a bit random, with uprisings in the beats placed in randomly. The cut off section was the right length, but the transition was a bit fast, you could have done better with it. overall, it was a good trance, but could have been better.
Kindness:
This one was good too, a nice trance beat, instruments worked well with it. only problem was the piano was a bit loud on the notes, and the fade didn't quite last long enough. The drums on this one were good, so not a whole lot I can say about those. Overall a good, track, although the voices sounded a bit too loud. And the piano sounded a slight bit out of tune, but not enough to matter.
Dark Symphony:
The instrument you're using sounds out of tune. Its also a bit repetitive. It sounds a bit over "twingy" to be a dark type of instrument, but you did your best and it works, for the most part. The voice at the end doesn't exactly fit in, but once again its a bit loud. The one major problem with this song is that I think you named it wrong. Don't worry though, naming the song is the hardest part.
A Song for Twilight Sparkle:
The deep back thud sounds really out of place, as well as a few of the instruments, but you're really going places with the drums building up the tune. The twanging cord instrument, as it sounds like, has a good idea, but it sounds like it could fit better in the song if you made it start at a lower volume and slowly build up until you have it at full, otherwise this is a good song.
Equestria:
The beat at the beginning sounds really random, like there is no pattern, and the instruments sound a bit out of tune, but when you get into the background whistle rising action, the beat sounds more rythmic. When the whistle ends, the instruments don't really match up or align very well, but its still rythmic. the drums on this one are good.
Overall, you're definitely making progress. Your later songs sound better then your first two or so, although they all sound good. You just need to work on better instrument selection and manipulation, as well as controlling the volume on the voices.
I hope this is what you're looking for

continue to make music. I can't wait to hear your future pieces