Just played it all the way through on your recommendation (and Jim Sterling's that you linked)
It has some serious issues. I won't refund it but I do feel like doing it.
- The core game is not engaging. I get it's a parody of a bad game but it makes you spend a lot of time playing the bad part
- The puzzles were extremely easy
- Use of achievements completely destroyed the immersion
- Lazy story. Throwing a few bible names on it and having "the devil" played straight was obvious. No twists to the story, played exactly as one would expect. The ending was an uninteractive 10 minute loading screen.
- Highly linear. The moments that looked like they were interactive were not - type something different and it gave you one obvious generic error message. I expect depth to the jokes off the beaten path, see Stanley Parable for this done correctly.