Overall you did very well. I just wanted to second the opinion that a little bit more variety would be helpful.
This actually very much reminds me of a composition I did a while ago that sounded very similar and suffered from the same problem. It is very similar, including just reusing the same pattern as if it's a new voice.
If you have any instruments, just improvising music (no matter how many mistakes you make) can be a good way to train your mind out of getting stuck in those little traps. Writing music by typing it into a midi file always results in a certain type of compositional pattern I'm finding, where I can tell the ones who composed in that way, as that's how I used to compose. It suffers because your mind hears the music in real time, and it's just hard to place down the right notes. Even when I still go back to writing music in that method, it feels like I've not improved upon it.
All that out of the way.... The soul of your music is very good and my critique is only meant to be in service to helping that that spirit be expressed!