One puzzle, the same for everyone
Every day at midnight, your local time, a new tide comes in: a new picture and a new deal. Everyone who plays on the same date gets the same picture, the same game and the same shuffle, so you can compare times with a friend.
A different game each weekday
The week has a rhythm: a 48-piece jigsaw on Monday, a slide puzzle on Tuesday, swap and turn puzzles mid-week, a 70-piece jigsaw on Friday, a big swap puzzle on Saturday and the largest jigsaw, 96 pieces, on Sunday.
Streaks
Finish the tide on consecutive days and your streak grows. Skip a day and the count resets to one, though your longest run stays on record. Streaks are counted in this browser only, because nothing about your play is sent anywhere.