Plan how to fit the loose shard into the crystal. It stays still until you commit.
Edit your plan with Undo or Clear. Press Commit my solution when you are ready to watch it play out.
Daily crystal: one committed attempt per day. Any shortest correct solution earns 25 XP immediately, with a class gamefeed entry.
Practise: try other puzzles without using your daily attempt. No XP. Replay never awards extra XP.
There is no timer. Take your time and check your plan in your head.