MultiWindows
About this game
Play through windows
Drag and drop windows to explore the world

Open multiple windows for interaction
Each window contains its own distinct gameplay content.
Characters can traverse windows to travel between different window worlds.
Utilize various mechanics to create unique differences between each window's world.
Employ a multi-window, multi-game mindset to solve puzzles and find exits.

This game was built using Unity (which lacks native window creation) and employs numerous incredible techniques to deliver an absolutely unique gaming experience.
Add it to your wishlist now—the full version is in development.
(Note: The current demo is an early build and differs significantly from the screenshots shown here. A new demo will be released with a proper update.)

It's a meta game that previously only existed in the imagination, allowing you to break window boundaries and interact in multiple game windows.