well, this module sounsd a bit chaotic. plus, it's very short. You should not spend only 20 mins on a module, but at least an hour, i guess. You could include different melodies then. In this case, you have this melody that repeats for the whole time (which isn't much), some drums and some chords. Ever thought of a bassline?
I didn't include one in my very first attempts aswell.
Conclusion: You have to spend a bit more time on your module
It could be a nice one if it was longer and included all the other stuff I mentioned
So if I wrote a review, I would have given this maybe 3 points, but not more.