Pause on Death - Freezes the game in place upon death before starting the death animation for a configurable amount of time, perhaps giving the player a chance to see what killed them in a hectic level.
Apply to gamemode 14 to make it universal or to specific levels
Upon dying, all sprites (including Mario) disappear during the extended pause. The pause is meant to show what killed you or how you died. Given that sprites are able to kill Mario, this would be a problem, especially in things like Kaizo levels. Did not try on SA-1 or console yet, but given it doesn't work even in a normal rom, it doesn't really matter.
I spoke with dtothefourth about this already and he has a fix, so nothing more needs to be mentioned. When that update is submitted I can test on SA-1 and console as well.