use the w,a,s, and d keys to move. Press the e key to shrink press q to switch weapons press x to fire press f to parry press m once the ex meter is full once you beaten the boss or you died, press stop and then click the flag to try again. (Though you don't need to parry in this fight)
This is the first airplane boss that i have attempted to give the bosses hixboxes. You can choose to make parriable stuff for the fight or improve it via remixing it.
