Does this happen all the time? Or only on a specific design?

Let me take a look and see if I can reproduce this.

Hi, 

I need to fix this.

I will be releasing a Mac version in a few weeks, so you can run it natively.

I am aware of performance challenges with the game. I haven't done an optimization pass yet. I am declining this request, since it is a duplicate of another thread on performance.

Declining as this is a duplicate of the Sandbox level request.