You should be able to download this PNG and open it in Pico-8. Thank you for considering paying for the itch download! But this was already available on Lexaloffle, so there's no reason for me to charge you for it haha.
Thanks for playing and for the feedback! I designed the enemies to be easy to kill if you had the skill to line up both shots to hit simultaneously, but I can see how that would feel spongy to a first time player.