Trying to earn gems, don't know what to write-4

Hmm, I've played a few rounds of 'Ghoul Dormitory' these past few days, and I almost wanted to curse. I encountered a ghoul that could open portals. So I thought about it for a whole day, and I figured out how to counter this move. Right when I start the game, after upgrading the bed and door to level 1, I fill all the empty spaces with level 1 turrets. Then, I only upgrade the turrets I want to keep. When I need to place new equipment, I dismantle a level 1 turret. The idea is to make sure my room has no empty spaces, it's completely full. But there's one thing to be careful about: you should only upgrade the evolving turrets last. Otherwise, you might cry. I forgot to upgrade them last, and I was about to cry because I had to dismantle a turret that had already evolved to the one I wanted to upgrade...