Hi! Thanks for leaving your comment. Like many lyric games, Crimson is written with the intention of being enjoyed as a literary text or poetic piece as much as, if not more than, a literal set of instructions. Yoko Ono's Grapefruit is a strong example of this kind of text that precedes me by several decades.
To be very clear, I would certainly never advocate self harm as a game instruction. In fact, I believe the game text states that the game is triggered by an accidental cut — a paper cut, for example — so that even in the conceptual framing, players are not imagining themselves causing deliberate self injury.
One possible change I could make, and am quite happy to, is to change the document to include a content warning at the top of the game, perhaps for "blood"?
I hope that was helpful and assuaged some of your concerns!
Warmest regards,
Jeeyon