Ghost Chaser

In Ghost Chaser the player's task is to go through all sixteen chambers of the haunted mansion in order to find the way to the treasure chamber. Some rooms are locked, so the player must find a key to them, and sometimes a key is needed to leave the room they just entered. In this mission, the player is hindered by various ghosts, which in addition to conventional shapes can also take the form of drops, fireflies, birds or razor blades (the latter kill on the spot). (wikipedia.org)