Space Fish is a terribly obnoxious boss, with like two seconds where you can actually hit it (or none if it spawns at the bottom!) and is all around very boring to fight as well :/
Hi, thanks for playing. He is very challenging, when he dives, try to stay at the top of the screen, and he will appear in your position, keep the shot pressed to hit some damage, improve your weapon in the build menu.
We just added easy back in.