That's not a fugue, at least not in the proper meaning. I don't think you can call fugue anything that just has different voices coming up and repeating the subject like that, there's other things that are as important. Fugue is a demonstration of mastery on counterpoint, this means that if you're not using any proper harmonic system and obviously building counterpoint based on that, you cannot write a fugue.
I would recommend you to first learn counterpoint theory on the harmony you like the most (baroque, classical, romantic, modern, atonal?) and then after you have practiced a lot of pieces with 2-3 voices then maybe start a fugue. Plus, a fugue needs to have exhibition, development and restatement, which yours doesn't have.