Yes, adjusting spawn rates (and otherwise giving you ways to control the number of enemies on screen) would be something we would work on. You can but only in broad strokes. Lack of sound and music is just a time constraint thing.
I understand. On rereading, my original comment was a bit negative. I really did enjoy your game, but there's so much untapped potential here! If you release a more polished version, please message me on itch or discord (iWonderAboutTuatara#6390), I'll be happy to play it.
