itch.io

My friend said it was the Konami code. You're talking about the floating eye in the sky after the dev joins the game, right? 

So I ended up getting two endings. One for capping the final flag. But there is a "secret ending" I guess? If you leave the game when he asks and then join back he will give new dialogue when you are about to cap again. When he joins the game there's a floating eye near your spawn that you can hit for a video of the dev writing what may be the komani code.