I recently released my first game on IOS and Android. It's called Twos! and is a puzzle/strategy game.
Check it out here:
It's FREE to play, so give it a go!
Also I run Gamemaker courses on Udemy.
How to Build an Amazing Space Shooter in Gamemaker - Special Discount Code
How to Make Tile Based Platform Games with Gamemaker Studio 2 - Special Discount Code