I love the vibe, very comfortable and nice. The build up from the intro into the main theme has great flow, and the shift in the accompaniment and drum line around 2:40 is a subtle and nice change in atmosphere.
I think why some people might find this repetitive lies in how your main melody remains very constant throughout after 1:38. Maybe including a few more obvious changes to accompany your subtle changes might help make this music even more engaging. For example, you could try introducing some rhythmic or pitch variations in your main melody, or periodically let a different instrument with a contrasting texture play the melody to spice up your music more? Just throwing out some ideas.
Either way, great job, I really enjoyed listening to this!
(Also, for the bass drums other comments are talking about, it sounded fine when I was listening with my earbuds, but they were a bit loud when I listened with my headphones, just FYI)