Running so slow!!!!!

My game slowness started with the race track. I read the forums and disabled a section of the track. Game play was much better but still shows a staggered lag. Lately, with the Zoominator, game lag got even worse, couldn't even scroll the screen. Again, disabled a section of the Zoominator and game play is better. Here is my gripe, I have a pretty brand new Kindle Fire HD, less than 6 months old and is what I use to play my games. My cell phone, a 2-3 yr old Motorola Android Droid, plays the game perfectly without having to disable any of the items. I'm not very techno-savvy, but how does my cell phone have a better capacity than a tablet? This is in response to those people swearing the game lag is caused by 'older' devices. Also, I'm old and trying to squint to see the little itty bitty things on my cell phone screen is hard, that's why I prefer a tablet.