Nice mechanics! You have a lot of gameplay stuff coming together with the attack cooldowns, limited-use weapons, sanity system, etc.
I think the timing effect on sanity might rush things too much, I tend to want to spam attacks and run for it; stealth seems unreliable given that it makes you slower. The nature of loops, deaths, and repeated tries also encourages suicidal rushes a bit.
Initially I was going to say I would rather be able to click the three attack buttons than use JKL as I need the mouse for inventory anyway. But it looks like you can, it’s just a bit inconsistent/unresponsive, maybe because it triggers on release of the button rather than on press?