Deleted

no

It was bundled? Well you can get it for free so I think this is reason.
Link

It was free on a site after doing some tasks.

it was given as a prize from a simple programming contest on code.org to almost everyone (there seemed to be multiple games to pick from, somebody made a thread about it)

for future reference, bundle list would be a good place to start when you do not remember when or where a game is bundled.

Edit: here's the thread: clicky

That'll never happen, lol