I jsut looked into the savedata.dataobject file but no idea what I would have to change in there to give myself the last missing key :-(
oh and, after the 20th like time reopening the game, stuff and abilities were still there, but map was blank beside a few rooms, so had to revisit to get them back on the map. no hard issue since by now I basically know the map layout by heart but still.
and I use the newest game version.
Also, somewhere in the earlier rooms (like the light brown ones from the start) you can walk into a pointless hole with a bonfire which, to my tries, you cant get out of with a single jump.
so can get stuck in there.
also, brown rooms in the top left, when you enter that room from the bottom, there are aura walls on the left and right.
if you activate aura, jump in the right aura loc, stand towards the right and deactivate aura, you can get pushed into the void.
you can easily glitch back in but jsut saying. aint game breaking , jsut funny.
beforementioned thing is an issue though if you go into that hole before getting doublejump.