I just came across this game called Euclidea: available on PC, Android and Apple.
It's really great (if you like this sort of thing).
I'm really impressed with the implementation on Android for small screen and inaccurate pointer.
Several of the constructions have more than one solution: a straight forward one, and, one which is much simpler, once you know the trick, but, difficult to discover.
Don't be tempted to look for the answers on YouTube you'll get far more satisfaction discovering them for yourself.
One final thing: some of the problems give you extra points for simply duplicating an answer with for example a mirror image. For example you're asked to construct a 30° angle at a point on a given line: you need to construct the angle above and below the line to get all the points, and this is not obvious from the way the question is given. You need all the points to unlock later games (unless you want to pay).
The 30° angle is also a good example of the "straight forward" and "easier when you know how" questions.
https://www.euclidea.xyz/
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