Lost in Anomaly Steam giveaway

In Lost in Anomaly, you wake up on the 9th floor of an unknown building. Your goal is to reach the first floor and escape from here. To get out of here, you must detect and mark anomalies. If you have marked all the anomalies, the elevator will take you to the lower floor. You should check every place well and mark accordingly because if you miss an anomaly, the elevator will take you back to the 9th floor.