(I know, very clever name)
This game was created with PuzzleScript. If you don’t know what PuzzleScript is, it is an open-source HTML5 puzzle game engine. And let me be the first to tell you, it is AWESOME!
I found out about PuzzleScript from StuartsPixelGames.com. He has some awesome, easy to follow tutorials that will have you creating you own games in minutes! You can find the games he has made by going to ThePixelShelf.com. As a starting point, I took some of the assets from the basic example game and tweaked them to make it feel like my own.
I will be continuing with the Unity Course, but you can expect to see more PuzzleScript games in the near future!