You have some interesting ideas hidden behind a rough sound selection and mix. The intro chords are nice but you could make them more interesting with some light strumming (making each note come in gradually, mimicking how a person would play a piano, instead of a blocky chord). The first synth/pad that comes in after the chords has a bit too much reverb, washing away everything else. The other synth that comes in and plays rhythmically is also a bit unexpected as there's no transition into it. The buildup however I think you nailed, it's really nice. I would have liked to see this song go into a direction where after the buildup you get to your chill part and it transitions into a chill drop, with like a gritty saw wave bass maybe, just some ideas.
My advice is to fiddle around more with mixing plugins (Eq's, compression, saturation, the whole lot). Keep up the good work though, and good luck with jamuary! :)