Originally a meme but came out sounding nice.

Originally I was gonna make a short meme-ish cowbell and triangle concerto but then I created a theme I liked too much. 

I like it....

Nice textural work.

It's interesting (though the meme potential is still there should you choose to run with it).
I would just say that a better blend of the horizontal and vertical motion could be achieved. Right now the horizontal parts sound stratified and the vertical chords feel static. This can be helped by varying harmonic rhythm or using extra non-diatonic suspensions to chords, thus opening up the sonic spectrum a little more.