use w,a,s,d to move and hold left mouse button to use laser machinegun. try and dodge attacks as he will kill you if you don't. If you want to fight him again, double click the flag or GLITCHES ;-; IT IS POSSIBLE I TESTED He has the same attacks as in terraria exept the sharks from tornadoes(I couldn't get that to work)
@BUTTERBATH FOR THE SPRITES (exept ufo witch I found) AND TERRARIA FOR THE BACKGROUND I made it so you could practice for the actual duke fishron without wasting truffle worms