Game lag and crashing...

Cool game, but the lag is irritating. I hate when it crashes in the middle of creating something. Used to play it all the time, until the computer got really slow and crashing became normal. Spent some iTunes money to buy upgrades and such, but it wasnt worth it until the lag and crashing is fixed.

Venoustoast2.0 about 3DTuning: Car Game & Simulator, v1.3.4