The app is great, very polished and fun to play, thanks mike! The calendar scorecard promotes the urge to solve them all – I hope the new year will not be a clean slate so I can continue trying to complete the full year.

Some suggestions to keep Sven busy:

• The rotation arrows appear bidirectional but always turn the same direction (top arrows rotate down, bottom arrows rotate up).

• There are only two rotations, how about showing only two one-way arrows on the top corners?

• Flipping the rectangle never helps, consider omitting arrows to flip the rectangle (or flip the U-shape on the long axis).

• If I quit and restart the iOS app, light/dark and vibration settings are lost.

• One time I had an apparent solution but it wasn’t counted. The L-shape was very slightly out of position, and moving it slightly locked it in and the solution was recognized. I haven’t been able to reproduce the problem, however. Snap into position works very well and gives satisfying feedback.

• Wordle took off by enabling users to share their solution without spoilers. Perhaps APAD could generate a scorecard with streak information and data about time/moves used to find solutions.

• I lost my streak because I forgot to play Monday. Perhaps an optional reminder would be a nice enhancement.