Dr. Metoro is an escape-the-room type game that should please anyone interested in games of this type, though it's not a very long game at all. (Shouldn't it be called Dr. Metro?)
You start out in the dark and it may seem as if there is no place to go. Persevere and you will find a fairly good challenge awaiting you at the other end of the tunnel. Hint: While in the dark, if you see Japanese writing appear when you try to move, assume it's saying that you cannot move any further in that direction. Back up and try something else.
I managed to solve the game in about 15 minutes without any hints or cheats at all. So, if I can do it, you can too.
With thanks to Maiko for the link. =)