TowerPest
Runs entirely in the browser: no install, no sign-up, on any phone.
About the game
The crane builds a perfectly straight tower all by itself — and you are the PEST with a goo gun: fire green slime, knock blocks askew, let the lean build up and bring the tower down before the crane finishes. The goo is not unlimited. Three builds, each tighter than the last.
How to play
Open the game and start right away — no install, no account. On a computer use the mouse or arrow keys, on a phone just tap. Your result is stored on your own device.