A small game, written during a MOOC
Try it on your phone it is free, has no ads, and requires no special permissions.

I wrote this little game while following a Coursera MOOC about game development. Now, by the time I took that MOOC, I had already been writing (and shipping...) games for 25 years, such as Liquid War or Babal, but it was a good opportunity to put some theory on top of what had been a rather empirical practice.
And I do love learning.
The game is very simple, a sort of "Memory" (tm) which will not blow your mind, but at least it works.
I sometimes use it to keep my neurons running.
The game code is released under the MIT license, and the graphics, sounds and music under CC BY 4.0, so all of it is free to use.
How to play

You are shown a series of faces, you have a few seconds to look at them, then they are hidden. You then have to find them again one by one, in order, by picking them among several proposals.
Every face is picked at random: eyes, nose, mouth, ears, hair, background. And the higher the level, the more the proposals look like the right answer. There are three difficulty levels, and the hardest one is, indeed, hard.
As long as you do not make a mistake, the sequence grows and the score goes up.
Get the game
- On Google Play Store for Android devices
The MOOC

The Game Design and Development specialization from Michigan State University is five courses, going from designing a game to bringing it to market. The courses use Unity, I preferred to do my own project with the Godot engine and godot-rust, the game logic being written in Rust, just like Babal.
Sending feedback
I am always happy to get feedback about my games. Whether it is a bug, a feature request, or just a general feedback, question or remark, I'd be happy to hear about you.
You can use ratings on Google Play, but sometimes the easiest way is to just drop an email.