UniMaker is a program designed for creating and testing levels inspired by classic 2D video games like Mario Bros for 8-bit and 16-bit consoles. It serves as a PC-exclusive fangame, offering users the ability to craft their own unique worlds reminiscent of the Mario saga. The program allows users to create levels and test them, as well as explore and play levels created by other users online.

The editor in UniMaker features over 20 templates based on familiar worlds such as meadows, caves, lava, and underwater settings. Users can easily drag and drop enemies and objects into their levels, customize sprites and tiles, and even modify configuration files using a simple scripting language. This extensive customization options provide users with the tools to create truly unique and personalized gaming experiences.