This is a very recently released game which is rated very positive (95% positive) on Steam.
The game is quite short (about 2 hours according to reviews) but it seems playing it co-op with a friend is a lot of fun.
If you do not have much time on your hands (due to having children, much work etc.), like puzzle games and want to play a game together with your friend or partner, then it might be worth giving it a try - cheaper than a cinema visit for two for about the same length.
Enjoy!
It maybe a good game, but I fail to see a bargain, that's the regular price it seems