When the game ends, choose a 4-character arcade name using A–Z or _. You can type it with the keyboard, use the arrows, or select Don't submit to keep it private.
Tip: watch the Next panel and the mascot callout to see the molecule name and shape before it arrives.
GLOBAL HIGH SCORE
Choose 4 characters using A–Z or _. Type with the keyboard, click a slot or its arrows to move the cursor, and use Space or _ for an underscore. Backspace/Delete enters _ and moves the cursor left. Do not use your real name.
Score: 0
Cloudflare checks only score submissions, so it appears here rather than before gameplay.