These were the official branding materials used as a logo, discord server picture, as well as the (discontinued) Kickstarter banner.
Here's the concept art for the logo. We tried a few different 'graffiti' and 'painterly' styles and eventually settled on the bubbly one.
Next are some really early exploration regarding what the game could've been. Eventually settled on the stingrays (last image)
A previous iteration of the character sheet, eventually had to be scrapped.