Guess what I found in Subcon Forest???

I was goofing around in A Hat in Time and discovered quite the treat. I implore you to check this out yourself as it seems to be universal.
I don't know if I'm the first person to bring this to attention as I'm not seeing anything on KZbin relating to this secret. There's also nothing on the wiki and no forum results come up. If you know someone who found this before me, please link it to me and I'll bring it to the forefront. Otherwise, I'll have to assume I'm the first one to discover this.