Tinykin is a 3D platformer with puzzle game elements, and features two-dimensional characters in a three-dimensional world. Players control intergalactic astronaut Milodane who is as small than an insect, an archeologist who must collect Tinykin, colorful tiny critters collected from eggs. Each Tinykin has a unique ability to help Milodane reach places and complete objectives. These include pink varieties, which can carry objects, red varieties that explode on impact when tossed, green varieties that stack vertically to form a ladder, blue varieties can use electricity, and yellow varieties create bridges. Each time when players meets a new variety an animated cutscene is shown. Milodane's abilities consist of making soap bubbles that can glide around, soapboard to hover or grind around and using Tinykin to progress. Players can collected pollen for exchange for an additional bubble. The game has no enemies, health bars and the only way to die is from falling too far or going in water, making Tinykin a non-violent game. There are six main zones which are described after rooms of a house. A free update in December 20, 2022 added the ability to select and change an outfit for Milodane and added a Time Attack challenge mode for each zone, a mode that players race around the zones.