"LEGO Worlds" is an open-world sandbox game that allows players to explore, create, and build in a procedurally generated world made entirely of LEGO bricks. The game features a wide variety of biomes, creatures, vehicles, and structures to discover and interact with.

It's both a single and multi-player game. The graphics are colorful and charming, maintaining the iconic Lego aesthetic with everything made from bricks. While not hyper-realistic, they effectively capture the imaginative world of LEGO. The game lacks a difficulty system as it is designed to be easy. Saving your progress is accomplished by exiting the game.

The length of the game depends on the player's engagement with the building and exploration aspects. There are no levels to complete, but rather an open-ended world to discover and shape to your liking. 

Navigating within the game is straightforward with a minimap to help with. The game encourages experimentation and creativity, making it easy for players to express themselves within the Lego universe.

"Lego Worlds" has a high replay value, as players can continuously discover new content, build unique creations, and explore different biomes. The open-ended nature of the game ensures that each playthrough can be a fresh and engaging experience. Overall, if you have a big imagination and love building Lego, then this game is for you.