WASD to move, Click (or hold) to shoot, Mouse to aim, Space to roll while moving. 1, 2, and 3 to swap your guns 9 to randomize them 0 to spawn the boss.
He is hard. He can teleport. He is fast. I didn't program dying but if you lose all of your health did you truly "win"? do not expect to survive first try. since your here have some tips! when the boss starts teleporting rapidly, MOVE. do NOT stand still. Phase 1 is the most learny phase but also ends the fastest due to it being kind of boring the final phase does the spiral, then starts adding random bullets, then cuts to just a random barrage. this barrage can be skipped if you kill the boss fast enough use gun 1 for the best experience its the one I used most