Art and Programming by Manic
Font Pixellari by Zacchary Dempsey-Plante
https://ztdp.ca/

Music and SFX from OpenGameArt.org:
Snowy Music by Frances Calceta
https://opengameart.org/content/snowy-music
Crazy Space by rubberduck
https://opengameart.org/content/crazy-space
Vintage P by Oldschool Alien
https://opengameart.org/users/oldschool-alien
Alien Fight by MegaJackie
https://opengameart.org/content/alien-fight
Aluminum ladder 01 by Eelke
https://freesound.org/people/Eelke/sounds/462598/
Footstep concrete by swuing
https://freesound.org/people/swuing/sounds/38873/
Laser fire by dklon
https://opengameart.org/content/laser-fire