You are stuck in an apartment building with endless floors. Observe your surroundings carefully to go up to the 15th floor and reach the roof of the apartment building. Do not ignore any abnormalities. Your carelessness could result in death.

You are stuck in an apartment building with endless floors. Observe your surroundings carefully to go up to the 15th floor and reach the roof of the apartment building. Do not ignore any abnormalities. Your carelessness could result in death.