The opening melody with the piano is good. the delay length is exactly a quarter note, which is kinda strange. I don't like the bass piano line at 2:00 though. One melody protip is to not have a ton of notes all of the same length without any breaks. It is very hard to pull off correctly and it'll probably just end up sounding silly. I used to do that a lot lol. I hear it again at 7:00.
I agree with piggemz, the opening piano needs more body, it could be really good with a little tweaking.
I like the beat at 2:40. the sounds at 3:30 are great. sounds like an ice paradise. 4:30 is good too, the introduction of the strong (but subtle somehow) bass.
my favorite bit is def that stretch from 3:00-5:00. good percussion :3 good stuff, you handled the ambient genre pretty well.