Remember when I talked up Sony's Cross-Buy system recently? Of course you do!
Well there's more good news on that front, as Tiny Brains is hitting the PS3 today with Cross-Buy functionality. What that means is if you've purchased the PS4 edition you'll get it for free on PS3, and likewise for the PS3 version.
So if you buy it now and decide to upgrade your "Station" later, you can re-download it. It's not 100% backwards compatibility, but I'll take it over nothing. Oh, and the game is pretty good too, especially if you have four players going at it locally.