2
Here's a fun idea:
Write a simple game (tic-tac-toe, guess the number, etc) that has an easter egg in it, that can be triggered by a specific, special input from the user and does something cool, but the code for the game does not appear to contain any easter eggs (or any obviously obfuscated code) at first glance.
This is a popularity contest, so highest vote by the community wins.
1Nice idea, but you should have more specific requirements. Please use the sandbox on meta to refine your question, then repost it. – None – 2014-02-22T04:51:57.070
1I think the question is too clear: a simple game with an easter egg. – Ismael Miguel – 2014-02-24T20:25:30.333