Right now, anything related to map construction and tiles is based on a 32×32 pixel grid. While this is fine for intermediate/advanced pixel artists, this simply is not friendly to beginners and people who wanna make simple sprites.
While it is true, you could just scale everything up 2x (or 4x, or 8x, etc…), it will not look authentic, since actors would be moving in what would appear to be “half-pixels”.
Only other option is to either create your tiles using actors, or using lower objects, which just becomes a mess after a while if you’re working with a lot of different tiles.
Option for 16×16 Grid
Closing as this is actually possible! We’ve recently covered it in a game recipe:
https://001gamecreator.com/game-recipes/#recipe10