Wait, just to make sure I understand you correctly - it's not like you beat the boss, and then the coffin still wouldn't let you roll credits?
If I understand you correctly, your idea is to let the coffin trigger some sort of post-game content, right? I don't know yet if I'll go back to working on this game. I probably won't, but in any case, it's a really fun suggestion, so thanks 😀 And thank you for the kind words, I'm glad you enjoyed it!
EDIT: no idea why you can't rate it, but I'll look into it 🤔