1. Introduction of the game:
Bloons Supermonkey 2 is an action-packed, arcade-style game that takes players on an adventure in a vibrant and colorful world. As the super-powered Super Monkey, players are tasked with saving the monkey kingdom from a bloon invasion. With a wide array of weapons and upgrades at their disposal, players must use their skills to pop all the bloons and restore peace to the land.

2. All characters and levels of the game:
In Bloons Supermonkey 2, players can unlock and play as various characters, each with their own unique abilities and skills. From the heroic Super Monkey to other memorable characters like Captain Cassie, Cactus McCoy, and more, there are countless options to choose from.

The game features multiple levels, each presenting different challenges and obstacles. From lush jungles to icy landscapes, players will traverse through a variety of visually stunning environments, each with its own distinct set of bloons to pop.

3. What attracts users most to the game:
Bloons Supermonkey 2 is highly addictive and offers a thrilling gameplay experience that keeps users engaged for hours. The game's fast-paced action and variety of weapons and upgrades make it incredibly satisfying to progress and defeat the bloon invasion. The charming graphics and enjoyable soundtrack also add to the overall appeal, creating a captivating experience for players of all ages.

4. Why it is popular:
One of the main reasons for the game's popularity is its accessibility. Bloons Supermonkey 2 appeals to both casual gamers looking for a fun time and hardcore gamers seeking a challenge. With its simple controls and progressive difficulty, it strikes a perfect balance that caters to a wide audience.

Additionally, the constant updates and new content added by the developers keep the game fresh and exciting. This continuous support ensures that players always have something new to explore and conquer.

5. When the game was released and how many versions are currently available:
Bloons Supermonkey 2 was released on May 18, 2017. Since then, it has gained a loyal fanbase and is available on various platforms including iOS, Android, and web browsers. As of now, there is one version of the game available.

6. The most difficult part of the game:
The most challenging aspect of Bloons Supermonkey 2 lies in the progressively tougher levels and bloon waves. As players advance, they will encounter stronger and more resilient bloons, making it essential to strategically utilize upgrades and power-ups to overcome the difficulty spike. This requires careful planning, quick reflexes, and a sharp eye for precision aiming.

7. Strengths and weaknesses of the game:
One of the strengths of Bloons Supermonkey 2 is its addictive gameplay. The game's mechanics are straightforward, allowing players to jump right in and start popping bloons. The variety of characters, levels, and upgrades provide endless replay value.

However, one weakness of the game is the potential for repetitive gameplay. While new levels and challenges are regularly added, the core objective of popping bloons remains the same. Some players may find the repetitive nature of this task less engaging over time.

8. What other games have been developed by the same developer:
Bloons Supermonkey 2 is developed by Ninja Kiwi, a renowned game development studio. The company has also created other popular games such as the Bloons Tower Defense series, Bloons Adventure Time TD, and SAS: Zombie Assault 4. Each of these games offers unique gameplay experiences and showcases the developer's dedication to creating enjoyable and addictive titles.