Mushroom Blocks Fixed (Hopefully)

So, I know the jam's not technically over yet, but I've caved, and the mushroom blocks should work properly now for everyone, not just me and like 2 other people.

I mean, I didn't think they were ever broken, so, hopefully this actually fixed them. I'm like 99% sure it did, but, I guess we'll see. ¯\_(ツ)_/¯