Non-16x16 tiles aren’t supported quite yet – see [bug] can't make tilemaps that would use 8x8 tiles
The pull request linked in that post will be in beta in a few days, though, so you’ll be able to test out the game then - you’ll be able to see when it shows up there when the set tile map to block gains an optional parameter that you can set to 32x32 like this:
