I am happy to announce that MateMathPro is out now. 

https://tibisoft.itch.io/matemathpro

I am planning to polish my old GMS 1.4 project using already a GMS 2.x. Actually it is not exactly a game, but a math-teacher for kids. This time I would add some more simple playable 'mini-games' as well. I have just recently opened this itch page for that, so if you have any idea or suggestion please feel free to let me know, many thanks in advance.

Zipped executable files for Windows can be downloaded from my page for free.

The short intro of Android app (free to download on Play Store)