Fun, but annoying – Merge Home City Review

I will admit I am slightly obsessed with this game. There is one frustrating thing that perhaps a designer could address. I have now 4 “dead” cells, 4 blocks have filled with the tiny house and I can’t merge them. Is there something I need to do? I am enjoying the game and it won’t stop me, just wondering if there is something I need to do?
Review by Mom2Peeps on Merge Home City.