Thanks for the feedback!
We were actually planning on adding volume sliders in the options menu, but we had procrastinated a lot of things until the last day so we had to cut it when we realised we wouldnt be able to implement them in a functional way without sacrificing too much time.
We also were planning on making more levels so the difficulty would have increased more gradually, but now it spikes too fast, and a lot of players get frustrated with how hard some of the jumps are.
Yeah i felt that opening the pause menu was kinda awkward in web, but i hadn't thought of letting the player change the keybind in the options. Probably should have done that.