Interesting start, but that intro section goes on for wayyy too long. I got very bored around 50 seconds in, wanting some kind of change or build.

The section that comes after that isn't really a new section, but rather the omission of certain sounds for a period of time.

Did you artificially increase the volume of the climax at 1:45? Because the sudden jump in volume is very awkward and actually dampens the energy that the climax could have had.

There are some very interesting ideas in this piece, and the sounds you are using, although very basic, work well with eachother.

You definitely need to work on your mixing skills. The levels of the different sounds here are all over the place. Compare the last part of the song to the first minute, notice the huge change in volume? You may think this increased loudness adds excitement, but there are much better ways to achieve that.

I also urge you to explore progression, change and the introduction of new sections in a piece of music. Try adding new musical sections, without just taking away or adding elements.

Sorry if I'm being too harsh, just trying to give constructive criticism. You're welcome to do the same for my music too :)