Slime-san is a character owned by Fabraz and Headup Games, and makes a cameo in Indie Pogo. He comes from the titular Slime-San series.
"Slime-san lived with his family until he was eaten by a monstrously large worm! Using his morphing ability to secrete through various obstacles, his mission is to find a way out of the worm's belly before the rising acid gets him. Slime-san loves green apples!" ― Slime-san's Trophy Description
Slime-san is a green ball of slime with red eyes. In his game series, he must escape the belly of a giant worm that's eaten him alive. By sliding across walls and platforms, dashing into blocks, and morphing through acid, his adventure takes him and his pal Birdie through the giant worm so they may return home to his slime neighborhood. There is even an entire city to visit within the bowels of the worm where Slime-San can purchase upgrades and costumes!