Plank and Bob

Bob and Rose, a happy and loving couple were living together without a care in the world. That is, until the Box nation attacked. They were vicious. They almost tickled Rose to death!

Luckily, Bob's old friend Plank was there to save them... for 50 levels until they finally escape evil Boxes.

Note for Linux users: Install love package of your distribution (make sure it's 0.10.0) and run the .love file.
#puzzle