Ultrakill made me appreciate instant respawns and notice the downtime that certain games give you when travelling back to the boss arena like Dark Souls.
I’ve been recently playing Kingsway which is a pretty unique roguelite RPG where the entire game takes place in a fake operating system inspired by the Windows 95 interface. Only on Steam though iirc.
Pretty fun, though I wish there were mods to increase the amount of content in the game.
I think the final door being open is because you opened it on an earlier playthrough, since characters share the same universe (unless you delete the universe save file)