E to switch weapons, and w in the air to parry, space to shoot, Q to dash, F to use an EX move (if you have a card). Press the green flag twice.
Inspiration from Cuphead ITS DONE! (BTW if you die before the ready wallop is done, then the death screen will glitch and not appear) (Also BTW if you start charging another shot before the fully charged charge shot has hit its target, the shot will do the damage of a small shot)