Hi Endeavour! Thank you so much for your review and taking the time to play this.
Our music evolves over the first 10 waves, do you think this was too slow? If you have any specifics, it would be very welcome, we are eager to improve.
I actually agree on the blackhole! Funnily enough, we ended up nerfed the blackhole just before pushing the game out. We also mulled around with the idea of blackhole powerups so maybe stay tuned for some day! :D