Mondrian 99 is a new adventure game developed by Happy for Windows. What makes this game unique is its innovative gameplay where players indirectly control the character's actions by changing the command matrix located in the upper right corner of the screen. As the game progresses, players will constantly acquire new commands and encounter new mechanics, providing them with dozens of instructions and mechanisms to explore.

The game offers infinite possibilities as players can freely edit the command matrix to achieve countless ways to clear the stage. The graphics are simple yet elegant, and the sound effects add to the overall immersive experience. Mondrian 99 is a full version game that promises to keep players engaged and entertained for hours.