1. Introduction of the game:
Will Hero is an exciting and dynamic arcade platformer where players embark on an adventurous quest to rescue a princess. With a distinctive one-touch gameplay mechanic, the game is both easy to start and challenging to master. Players control their heroic character through various obstacles and enemies, utilizing a range of weapons and abilities in their journey.

2. All characters and levels of the game:
The game features a hero as the main character, along with various unlockable characters, each with unique aesthetics and possibly different gameplay perks. The levels in Will Hero are procedurally generated, ensuring a fresh experience each time a player begins their adventure. The landscapes are varied, with each level increasing in difficulty, offering new challenges, and introducing different enemies and traps.

3. What attracts users most to the game:
Players are most attracted to Will Hero's simple yet engaging tap-to-move gameplay, which provides quick, intense play sessions perfect for on-the-go entertainment. The game's vibrant and colorful graphics, along with the satisfaction of unlocking new characters and powerful weapons, keep users captivated. Moreover, the constant updates with additional content give players something new to look forward to.

4. Why it is popular:
Will Hero’s popularity can be attributed to its addictive gameplay loop, which strikes a balance between approachability for beginners and depth for seasoned gamers. The charming pixel art style, rewarding progression system, and the game's ability to provide a 'just one more try' feeling contribute to its widespread appeal.

5. The most difficult part of the game:
The most challenging aspect of Will Hero is often the increasing complexity of levels as the player progresses. Timing and precision become crucial, especially when the game introduces faster enemies and more intricate traps. Mastering these elements is what sets experienced players apart from beginners.

6. Strengths and weaknesses of the game:
Strengths of Will Hero include its accessible gameplay, appealing art style, and regular updates with fresh content. However, some players may find the game's reliance on in-app purchases for unlocking characters and certain advantages to be a weakness. Also, the randomness of the level design, while keeping the game unpredictable, may sometimes lead to frustrating situations for players seeking consistent challenges.