So this is your first completed track? It's pretty nice actually.
Okay, the drums are the ones that need most improvement. They are really quiet, and they have almost no power behind them. Especially starting from 3:26 the kick is almost inaudible. You need a louder, more compressed kick, and then maybe sidechain it with the melody.
And yeah, it was very repetitive. There was hardly anything really interesting to keep the listener hooked up for the whole four and half minutes. Afterall, It was basically the same melody over and over again. More different sections and instruments would've helped a lot.
My final advice? Make more music, obviously :) You are starting out pretty good, definitely better than most 'first songs' I have heard. I'll definitely be wanting to hear what you've got for the future ^^
(PS. to make those links, you just have to copy the url of the song and paste it)