Basilica de Sangre is a medium-length puzzle-based comedy. You play as a demon trying to rescue your mother, who has been captured and held prisoner by a convent of nuns.
It reminds me a lot of the other game of Bitter Karella's that I've played, last year's Guttersnipe: St. Hesper's Asylum for the Criminally Mischievous. Both games were written with Quest. Both feature the same irreverent sense of humor that pokes fun at authority but never comes across as mean-spirited. Even the puzzle styles felt similar. I did manage to solve Basilica de Sangre without hints, though, and that wasn't the case for Guttersnipe. I think that's partly due to the design of Basilica and partly just good fortune on my part.
To continue the comparison, while I enjoyed Guttersnipe, I do think Basilica de Sangre is a better game. The puzzles are a little better-clued. Mainly, though, I think Basilica is better because of the main puzzle mechanic: Since you're a demon, you can possess any human character you meet in the game. This means that many of the puzzles entail figuring out which character has the attribute you need to achieve your current goal. It's also fun to speak to all the other characters while in the body of particular character. The responses are amusing and often give you clues about the puzzles.
I'm a fan of a simple puzzle mechanic used in multiple ways, and Basilica's primary mechanic achieves that.
My favorite line in the game occurs when you finally reunite with your mother. It weaves the mother/child relationship together with the fact that you're both demons in a manner perfectly in keeping with the game's overall tone. It made me laugh out loud.
I also enjoyed the final climactic scene. I wouldn't call it a plot twist, but it was somewhat unexpected and even kind of appropriate from an IF standpoint.
If you're a fan of Bitter Karella's other games or just enjoy irreverent, light-hearted puzzle comedies, you should play Basilica de Sangre.