You weren’t too harsh! All great feedback!
I suppose it is not a tower defense indeed now that I think about it. We’d need to have towers to defend the conductor tower. I hadn’t thought that bit through, only the bit that I was “defending” the conductor. I’ll fix that.
Do you think this could be fun working as a rythm game? I am not sure how to do that and keep making good use of the spatial and disc-rotating stuff, but I don’t really know how yet.