Turn the dial, listen for the thunk, beat the alarm.
Crack the Vault is a browser game with 16 safes, drawn in isometric line art. You circle the dial with a pointer or the arrow keys, wait for the deep thunk that marks a number, rest on it, then reverse direction before the timer runs out. The whole game is a single self-contained HTML file.
One file, no install, no network.
The game ships as one HTML page with its styles, code and drawing runtime inlined, so it opens anywhere and works offline. It plays with mouse, touch or keyboard, and multi-dial safes let you switch dials with the up and down arrows. One safe hides a cat, and it moves every time a safe is cracked.
