I love the composition in this one. You seriously have good ideas for trance music. Everything in this song, the pads, leads, progression, have really good melodies.
It's very relaxing, very trancey, very atmospheric.
What's that synth at 1.43? I love that pluck! 8D
This song just kind of lacks in one aspect: mixing. I can hear many synths in the same frequency range trying to compete with each other. Like the square synth at 0.58, feels like it's ducking in and out of the sidechained synth, and some others. What you can do is try to eq different synths to different frequencies, such that not too many instruments will take one frequency range. Especially the low mids, that seem to make every instrument sound fuller but really muddies up the song. Try to EQ every synth that is used, even if it's a preset.
Another thing that can be improved on is the kick. It sounds rather recessed into the background, and not that punchy. Probably can be fixed by EQing it. Try to boost the sub-bass and low bass, and a bit of treble and high mids. To make it stand out more, avoid letting other instruments take it's frequency ranges by cutting away the bass of all the other instruments. Many instruments have unneeded bass, probably as a result of reverb on them, that when added all together into a full song, can really take away from a kick.
Also, avoid adding reverb on low pitched instruments like the kick. This helps make the kick drum really punchy instead of distant. If you really want to, make it subtle. It's the bass frequencies you should watch the most, and make sure it is only dominated by the kick drum (and a select few other instruments, like the bass and possibly pads. Use parametric EQ 2 to see what frequencies each instrument has.
I'm not the expert mixer myself (self taught, and internet help), but I really hope these tips can help you in making music. This song is really good, I really love the melodies of this. Keep it up! And keep on making great music!