Accesskeys are not working for me. (I’m on Firefox, where the accesskey modifer is control+option.) Whether it’s previous level (Z), next level (C ), mute/unmute (M), pause (P ), show help screen (L), or anything else, it doesn’t work at all. Nothing happens. I’ve tried other accesskey modifiers just in case, without success.
AdBlock and tracking protection are turned off on Memrise, so that isn’t the issue. I also don’t have any extensions that would affect Memrise. (Edit: I double-checked by launching my browser in Safe Mode.)