Thanks for playing! YouTube integration is on our to-do list :)
Rebinding the controller is something we want to get to, but it'll probably be a little later in the pipeline. For now, even though it says "gamepad A", the other buttons also work, so hopefully that'll be a good-enough workaround until we get a proper rebinding UI/tool built.
Balancing the enemy spawn, their hp etc is definitely something we'll investigate more, thanks!