First of all it’s because HLM:R was not optimized (its was build on old HLM) and because of the many object game may lags so much on some PC.
Second, FUN Mode it’s a mess with sprites and Third Yes you need finish all levels first.
Level will be upside down and filter will be more blue, ammo will be reduced, more enemies, etc. (If you don’t know how to enable hard mode you need just press space bar in level select.)
For Aubrey mask I will give you a hint
Look around in intro of safehouse.
if you don’t have puzzles in the redux but they do in the original, then you need to collect them again (well, more precisely, download the save on boosty because ˅˅˅).
But if you simply don’t have puzzles at the level, then this is just a bug that we are fixing.
