itch.io

Featuring adorable aesthetics and charming characters, these projects often incorporate whimsical designs, pastel colors, and endearing elements.

Pretty sure everything is indie on itch.io but just in case you want something extra indie.

Unity is a game engine for 2D, 3D, AR and more

Voxels are small geometric primitives used to construct larger worlds. Sometimes called 3D Pixels, they are typically cubes.