I was really curious to see what Gerbils! is in the Applications folder, but that just triggers a hard lock up after the splash screen. I see the menus are "Environment", "Rendering" and "Camera" though.
Gerbils! is a demo app for QuickDraw 3D where gerbils are racing on a roller coaster track (or similar…it’s been a few decades). It existed for classic Mac OS too (I remember playing it on a 6100)