The melody seems entirely random, the chords are repetitive, and the whole thing lacks variation.
My advice would be to start with the melody - a good melody should stand on its own - and make sure the bassline changes occasionally. Ideally, you should only have to slow down this way when you want to emphasize something.
That's what minimalism is, deal wit it. I also felt like making it atonal, if you see my other works, they are very tone obsessed