1. **Introduction of the game**
Evoland 2: A Slight Case of Spacetime Continuum Disorder is an action-adventure RPG that cleverly takes players on a journey through the evolution of video games. Developed by Shiro Games, this sequel to the original Evoland expands on its predecessor's concept by featuring a greater variety of gameplay styles and graphical evolutions. Players will find the game constantly changing as they progress through a deep and rich storyline.

2. **All characters and levels of the game**
Players will navigate through the game as the main character, who is joined by several companions throughout the adventure, each with unique abilities and background stories. Key characters include Kuro, a young man suffering from amnesia; Fina, a fiery girl with a mysterious past; and Velco, a robust robot with a heart of gold. The levels in Evoland 2 are just as diverse as its characters, with environments ranging from 2D RPGs reminiscent of the 16-bit era to 3D adventures, platformers, and even real-time strategy battles. The game's ability to switch between genres as players progress through different time periods is both creative and nostalgic.

3. **What attracts users most to the game**
Evoland 2 draws users in with its unique blend of genres and homage to classic gaming. Each shift in time brings with it a different gameplay style and graphical change, making the game feel like a loving tribute to the history of video games. The game's humor, references to iconic games, and variety of puzzles and challenges are key factors in its appeal.

4. **Why it is popular**
The game's popularity can be attributed to its innovative gameplay mechanics, charming pixel art to 3D graphics, and the way it triggers nostalgia in gamers who have witnessed the evolution of gaming over the years. Its storytelling and character development further add to the game's depth, making it more than just a collection of different gaming styles.

5. **The most difficult part of the game**
One of the most difficult parts of Evoland 2 is its occasional shift into genres that may be unfamiliar or challenging to the player. For example, some might find the real-time strategy sections or timing-based platforming levels particularly tough, as they require a different skill set than the RPG elements. The game also features numerous puzzles that can be challenging to solve without keen observation and patience.

6. **Strengths and weaknesses of the game**
Strengths of Evoland 2 include its innovative merging of different gaming genres, the variety and depth of its gameplay, and the way it plays homage to video game history. On the downside, the game's constant switching between genres may be disorienting for some players who prefer a more consistent gameplay experience. Some may also find certain references and in-jokes obscure if they are not well-versed in video game lore.

7. **What other games have been developed by the same developer**
Shiro Games, the developer of Evoland 2, is known for several other titles. Apart from the original Evoland, they have developed games like ‘Northgard’, a strategy game inspired by Norse mythology, and ‘Darksburg’, a cooperative survival action game. They are known for their innovation and attention to detail in the games they create.