(There's no video for Blocks yet. Please contribute to MR and add a video now!)
Blocks is an early and tiny (3KB!!) blocks stacking simulation, in which you click the mouse to add/remove rectangular bricks in a demi-brick unit fashion, so you're kind of limited to a grid to place them. There's also an option that calculates where bricks fall when you remove underlying ones. It's very primitive and you cannot save/load your creations.
I'm kind of impressed this works flawlessly under Mac OS 9, thinking it's a 1986 application that was designed for Mac OS 4.
Blocks.sit (1.99 KiB / 2.04 KB)
Blocks v1.0 / compressed w/ Stuffit
Mac OS 4.x - Mac OS 9.2.2
Emulating this? It should run fine under: Mini vMac