Yeah! It is by design to be able to rotate items that way. Im glad you figured that out. Originally I was going to have rotate buttons, but wasn't sure how to make that work on mobile if they don't have a multi touch screen. It was also intended for things to get crowded near the end. I thought the chaos would be kinda fun. In my next update I intend to add mechanics to get rid of unwanted items and I'll also be removing new items blasting into your play area. Those changes will probably make the game a bit more strategic and a little less chaotic which seems like a better way to go.