Ok, so I figured the mini-lag is caused by the achievements popping up. When there are no achievement notices there's no lag. Fix it please! Great game otherwise
The sad part is the stolen version actually worked better. The lag in this one kills the enjoyment for me. I'm sure the Dev can fix the lag though. Fun game without lag.
 "Epic Coaster"){kind=icon}
 "GeoSketch"){kind=icon}
 "Achievement Unlocked"){kind=icon}