A classic puzzle with Cocos2dx.

There is not much to say here, you should know the game. Click on a square to move it into the hole, until all the numbers are sorted.

• I don't have prior experience with Cocos, but... it works well and it is not hard to use!
• Except its setup. It still wants Python 2 (in 2021!).
• This repository may be bigger than needed. I did not have time to find a way to avoid pushing in the whole Cocos code.
• I don't guarantee it compiles (Visual Studio 2019) out of the box.
• All I can say in my defense is that I tried to keep the code clean and defensive.