Today, during a live presentation at Reboot Develop 2017 in Croatia, Braid and The Witness creator Jonathan Blow revealed a very brief sample, a prototype, of his his unannounced upcoming game he's working on.

The teaser comes in the form of Blow offering up a snippet of the game running in-engine. According to Blow, he has been working on the game over the last year, and has already created about 25 hours worth of single-player gameplay.

Of the little that is shown -- which Blow notes is visually not even "remotely final," but is the only thing he has that even is showable at the moment -- we can see a guy running around pushing blocks. Further, it looks like it could be another puzzle game, which given Blow's reputation and history is no surprise.

You can see the prototype of the game for yourself via the video below (5:32:44 mark):

https://player.twitch.tv/?video=v136836272&autoplay=falseWatch live video from RebootDevelop on www.twitch.tv