Add game dev ideas

Includes [49 Ideas for Game Clones to Code](https://inventwithpython.com/blog/2012/02/20/i-need-practice-programming-49-ideas-for-game-clones-to-code/) and [Game Clone Challenges](https://github.com/rby90/game-clone-challenges)

Author: sidtr0

ideas.md

@@ -11,6 +11,8 @@
 - [Rosetta Code](http://rosettacode.org/wiki/Category:Programming_Tasks)
 - [Epic List Of Side Project Ideas For Programmers](https://livingliferichly.com/epic-list-of-side-project-ideas-for-programmers)
 - [5 project ideas](https://medium.com/@JohanneA/5-project-ideas-for-programmers-who-dont-know-what-to-work-on-next-51fdb191cbde)
+- [49 Ideas for Game Clones to Code](https://inventwithpython.com/blog/2012/02/20/i-need-practice-programming-49-ideas-for-game-clones-to-code/)
+- [Game Clone Challenges](https://github.com/rby90/game-clone-challenges)
 
 ## Programming Challenges