In game design, providing a variety of clearance options can greatly enhance the player experience and replay value. Allow players to pass levels by upgrading character skills or choosing different skill combinations.

Users of personal computers and cell phones can play through the website and downloadable client.

Multiple endings are designed based on the player's choices, and players can explore different plot developments and endings according to their preferences.

It provides a multiplayer cooperative mode where different players can play different roles or skills to collaborate and pass levels.