Formulaic. Repetitive. Awful. The original "Papa's" game was fun the first time around...sort of. Then the author discovered that the character sprites, backend coding and all the game mechanics could be reused to create endless clones. TL;DR: Copy/paste with a few changes in appearance does not a new game make.
I love how the game crashes and doesn't save progress. Awesome, very well thought-out, etc, etc. Other than that, the game is good. I wish I could tell the characters to STFU, and I often find myself wishing gameplay were faster - particularly given that I'm now going to have to replay the first 3 campaigns.
I absolutely love these games, they're hilarious, fun and a great way to waste some time... What I don't love is that it locked up at the golden bush part (over an hour in) and didn't save my progress.... Lame.