@pinkemma @belowparallel-ian The ship shouldn't be invisible, nor should the asteroids... Strange, I will look in to it and let you know. You could also try it on the Itch.IO page, it might be a bit smoother there... Or just download the Windows EXE, which should work 100%.
@morphine: There are upgrades for the turning speed. I need to play with the frequency somewhat, but, well, balance is hard... I'll also probably make it more obvious for a future build, but that will be easier with artwork that I don't have to design on my own, or use unicode.