Sorry guys, but dividing the screen is not a real solution. A screen size of 8x8 tiles is just too small for that. Sure you can do it technically(I have done it on some screens), but it results in unremarkable levels, that look like series of corridors.
Now, if you have an option to choose 2x screen canvas size(16x16 tiles per screen), that would fix that problem perfectly:
You won't have to add extra screens, keeping the existing 3x3 map grid(which I really like) and people will have enough space to make bigger games(if they want). It would be a win-win situation.
PS:
If you think 16x16 is too big(Whimtale uses 15x15 for comparison), perhaps try 12x12(1.5x default) tiles canvas? I'm pretty sure that size will make everyone happy.
