Algodoo

Tips:

-Slow down on downhill section to prevent hitting ground hard and damadging your wheels

-Try to be pushed by " ! " (you will know which "!" I'm talking about ) only at your back - otherwise it will push you into ground

-Don't slow down in shop - you need to hit hard. Then stop with your car floor over a list - otherwise you may fall down

-you need quite a lot of CPU power to run smooth - My 2.66ghz C2D gives me only over 50% speed.

how do i get past the spikey things?

There are 3 "spikey things" - first is a spike strip - go slowly and allecerate between spikes

Then "stars" - unfortunatley they will be catchetd by your tires and over a time will flatten them - simply don't bother.

At last - spikey chain + jump - Solusion is simple - if you don't have flat tires - go as fast as you can - if you have - you cannot go fast enough