Ugh...I really wanna write something like this. But every time I try, I hit a dead end. I find this even more wonderful because it's in B minor. I thought that sometimes the ideas pieced together too well and made the song a little boring. But, I can't really complain because I think this style of music is hard enough just brainstorming. Measure 23 showed the biggest and most exciting change, to me. That was my favorite part, the left and right hands were fighting in a way that I don't think is heard at any other point of the piece. Yeah...this is overall a great little invention. I might attempt to learn this song from the sheet music you put and maybe learn some things from you about writing in counterpoint. Thanks for posting and great job!
2 part inventions aren't really meant to be super-entertaining, but test your compositional chops. Inventions, fugues, and canons are technique pieces to pretty much show off writing skills, and yet hold some creative retention. My suggestion is to find yourself Bach's collection of counterpoint pieces and use those as a guide. "The Well Tempered Clavier" is probably your best reference. Also, just learning the form, is a good place to start :]
Please contact me if you would like to use this in a project. We can discuss the details.