Im not one for classical, but i love this.
simple, yet catchy.
I like the echo effect you have, did you actually add an echo? or just play the same note quieter.
If you want to remove the repeditiveness, my sujjestion is have a violin come in playing the same melody, maybe slightly different, replace the echoed notes with other notes perhaps.
anyways, keep up the good work, this is one of my favourites by you