Magero Font by code807 - code807 - itch.io
https://code807.itch.io/magero
No License Given, In the words of the author: "This font is free to use with attribution, both commercially and privately."

Explosion Animations Pack by ansimuz - ansimuz - itch.io
https://ansimuz.itch.io/explosion-animations-pack
License: CC0 1.0 Universal (CC0 1.0), https://creativecommons.org/publicdomain/zero/1.0/

Cyberpunk Street Environment by ansimuz - ansimuz - itch.io
https://ansimuz.itch.io/cyberpunk-street-environment
License: CC0 1.0 Universal (CC0 1.0), https://creativecommons.org/publicdomain/zero/1.0/

Smoke & Fire Animated Particle [16x16] by KnoblePersona - opengameart.org
https://opengameart.org/content/smoke-fire-animated-particle-16x16
License: Attribution 3.0 Unported (CC BY 3.0), https://creativecommons.org/licenses/by/3.0/

Plasma Rifle, Dark Matter Pistols, Plasma Cannons, Vortex Cannon and Slime Shooter Assets - JWBS_Steam - https://reddit.com/u/JWBS_Steam
https://www.reddit.com/r/PixelArt/comments/5bwrpp/ocnewbiecc_nuclear_throne_weapon_idea_spritesheet/