Hey people!
Not sure if this is the kind of thing you want posted here, but there is a game jam called The Flappy Jam right now.
You make a simple but difficult game that can be based on Flappy Bird, but doesn't have to be.
It's a cool jam with a basic concept that I think would be fun for beginner and expert game developers alike.
I hope people are interested.
Here is the game I made for it: http://fashionbatman.itch.io/the-flappy-saga
I used unity and it was easy and tons of fun to make.