1. Introduction of the game:
Last Day on Earth: Survival is an addictive mobile game that thrusts players into a post-apocalyptic world, where they must fight for their survival against hordes of zombies and other players. With resource gathering, base building, and intense PvP combat, this game offers an immersive and challenging experience.

2. Characters and levels of the game:
Players can create unique characters and customize their appearance to their liking. As they progress through the game, they can unlock various levels, each offering new challenges and rewards. From constructing a humble shelter to establishing a formidable fortress, players must strategically build their bases to withstand the onslaught of enemies.

3. Attraction for users:
What attracts users most to Last Day on Earth: Survival is the intense gameplay and the ever-present threat of zombies. The combination of resource management, exploration, and combat creates a dynamic and thrilling gameplay experience that keeps players engaged and coming back for more.

4. Popularity of the game:
The game has gained immense popularity due to its immersive post-apocalyptic setting, addictive gameplay mechanics, and regular updates from the developers. Its challenging nature and multiplayer aspect allow players to interact with each other and compete for limited resources, adding another layer of excitement.

5. Release date and available versions:
Last Day on Earth: Survival was released on May 28, 2017, and currently, multiple versions have been released to enhance the gameplay experience. The developers frequently update the game, introducing new features, gameplay improvements, and events to keep players engaged.

6. Most difficult part of the game:
The most challenging aspect of Last Day on Earth: Survival is surviving in hostile environments while managing limited resources. Players must balance their food, water, and health needs while venturing into dangerous territories where zombies and other players lurk. Additionally, the scarcity of valuable items and the need to constantly defend one's base make survival even more demanding.

7. Strengths and weaknesses:
The strengths of Last Day on Earth: Survival lie in its engaging gameplay, stunning graphics, and regular updates that keep the game fresh. The vast array of weapons, armor, and building materials available to players allows for diverse strategies. However, some players may find the grind for resources and the steep learning curve to be a weakness in terms of initial progression.

8. Other games by the same developer:
The developer, Kefir!, has also released other popular games such as Grim Soul: Dark Fantasy Survival and Frostborn. These games share similar survival elements and showcase the developer's expertise in creating immersive and challenging experiences in post-apocalyptic settings.