Question about replay-ability. (NGP, Endings, etc..) SPOILERS

[mana]

WARNING SPOILERS AHEAD YOU HAVE BEEN WARNED
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just got through past the riley ending. i thought this was a joke ending at first because it says 'A game by Foregin Gnomos' misspelled, but actually it ended up being the ending.

There is no New Game Plus on the menu or any text about it, and it doesn't seem like there were any other endings. Am I wrong about this? Is there more to do?

When I was in the human world as a spirit, I noticed more lamp posts below the fence that I could not reach and was under the impression I'd be returning.

Also, when I got back to the original realm from the first game, it told me to go back and confront the light being but I didn't. There's no way to go back besides replaying, right?

[Groversoup]

I can only speak on the last one, but there's a glossary room where you can replay any fight in the game even if you've never encountered it yourself