The game is hilarious and tons of fun; it's very skill-based and addicting, and very difficult in a trolling kind of way because of surprises and mind games.
However, it's clearly just a cash grab. There are ads everywhere, every time you lose no matter what mode you choose, but there's no real point in doing the 1-life mode because the game is extremely difficult. And there's a waiting time to play the Normal Mode again when you've lost all 10 lives - and at first, the waiting time is 5 minutes, which is very reasonable. But the second time, it goes up to 17 minutes - which in my opinion is also reasonable.
BUT - Right now, on my third time playing, my waiting time is 133 MINUTES. I have to wait for two hours before I can play the game again, or fork over money? The game designers definitely deserve money and I can't fault them for wanting it for making such a fun and charming game, but there's a way to design the game so that it's not pressuring people to spend money for ridiculous reasons - like avoiding a 2-hour wait (which will probably grow next time I play the game, since it grows every time you lose) just to play again. That's ridiculous. If they shorten the wait, I'd definitely consider increasing my rating, but if they're going to be that ridiculous and transparent about wanting money, then count me out.
(Update: after the 2-hour wait is a 24-hour wait. Ridiculous.)