I have played through the game... what now?

So I have now finished the game for the first times. I got the ending where ​the player gets turned into a cardridgeand I have also unlocked peaceful mode.

Without spoiling too much please... what should I do now? I am certain that there are multiple endings or paths you could take, but I cannot think of one instance in the game where I had the freedom to choose more than one option. Can you give me a bread crumb, a little hint, what I could do differently or pay attention to to get a different path? Again, please just hints and not blatant spoilers if possible.

Also, a bit unrelated, but while I am at it. What's up with this violet tin with a pencil inside of it and a heart post-it on it? It's always positioned differently, but I do not have any idea what it means and if i can do something with it.

Thank you for your help in advance!