I really like the bass in the beginning. Along with the other instrument it gives it a very spacey atmosphere. Then it feels like you're getting closer and closer to a force of unsecurity, something like an asteroid or a gas giant. I do not think it is mixed the best, as the main melody is way too quiet in my opinion, and it makes it kind of hard to decypher. I don't know if it would be in your taste, but at least I would spice up the snares a beat during 1:17 every 4th bar or so, it'd definitely make it sound less dull. I really like the surprise around 1:45, and the key change, I think that's a solid idea as a whole and would like to do something like that on my own some time in the future. I think the melody is about right in the last minute or so, the ending also is pretty fun. What I feel like this track is missing is a bit more diversion, mainly on the drums as they feel the same from start to finish, and also work on the audio leveling. Other than that it's pretty solid.