I posted this on Discord and people figured out what this was pretty quick:

Yep. Five Nights at Creeper’s Remastered.

I’ll quote what I said there:
“Here’s the thing
Before I continue with the story, I want to retcon some plot points in the first game
And also give the first game the remaster it deserves.”

Speaking of Discord, I have a server in case you missed the other devlogs. It’s pretty dead at the moment, but I’m trying to revive it by uploading exclusive teasers over there.

Here it is.