(There's no video for MouseTrap yet. Please contribute to MR and add a video now!)
MouseTrap is an early 1980's programming demo that featured a mouse capture in a square in the center of the screen. That's all there is to it.
MouseTrap.sit (1.93 KiB / 1.98 KB)
MouseTrap / compressed w/ Stuffit
Mac OS 1.x - Mac OS 9.2.2
Emulating this? It should run fine under: Mini vMac