It's all randomly distributed, however, you will always be able to make some combinations, and the more you make, the more you open up the grid for more combos from further away. There are so many possibilities, such as 4,3,3 or 7,1,2 or 2,1,1,2,3 or even 1,2,3,4 to name a few. I've tested countless times so I guess my eyes are just so accustomed to seeing the combos that you can make right away.
So sorry to hear about the resolution scaling issues. I got a similar report from someone else that I asked to test, but I haven't been able to recreate the problem. I'll definitely work on fixing that. It's also why I included a windows version.
Thank you for playing!