Totally free!
It has a game system in which you randomly unlock the puzzles.
How are they unlocked?
- If you have completed all the puzzles you have unlocked, you can continue unlocking. That is, if you unlock and do the puzzle you have no limit.
- One free unlock per day even if you don't have the puzzles completed.
- You can unlock by viewing an ad.

Other features:
- All the unlocked puzzles are all on one page, arranged with the last one modified.
- You can save your favorite puzzles to access them more easily.
- You can redo the puzzles as many times as you want.