Binding of Isaac dev teases unannounced project

The Binding of Isaac developer Edmund McMillen announced the contents of Isaac: Afterbirth Plus' second 'mod booster' pack yesterday, and right at the bottom of that blog post, as if to reward people for scrolling down, he revealed that he's been working on another project with frequent collaborator Tyler Glaiel. It's an "unannounced IP", so it's presumably got nothing to do with second mod booster pack, which once again incorporates some select mods into the base game. This time, give a big welcome to the projectile-repelling Telepathy, the item-ferrying Moving Box, the charge-replenishing Jumper Cables item and more.