One fix and one new option, thanks for the reports.
"Pause when losing focus" now actually works when Chrome takes focus: it wasn't stopping the game in that specific case before. Fixed. (Thanks sworded for the report.)
New option: auto-restart the floor on death: Options > Display & Interface. On defeat you get a 5 second countdown that relaunches the same floor automatically, with a visible progress bar. Any click or key cancels it. Off by default.
Keep the reports coming in the bug thread, I read it every day ːsteamhappyː