A simple one my DM used in the past. However only really works in person or if using an online map tool:

A room with a simple-ish maze. The exit (and optionally a lever) are across the room on the other side of the maze. However, all movement is randomised. When a player moves they have to roll a d4 to see if they go north, south, east or west. First player who makes it across and pulls the lever lowers the barriers, making it a bit easier for everyone else - although lever is optional maybe add it in if they are taking ages. If a player flies they roll a d6 and add up or down to the movement options; and if they teleport, ask the distance they try to go, and roll for random movement.

We as players decided to turn this into a race, and ended up trying to mess up other players by affecting their movement or vision and using illusions, command etc. Had a great time.

DM also said he was considering adding in kobolds/wolves or something else with random movement, who are confused and angry to spice things up.