As all Bossmedia games even this one have the bonus round feature and you need to collect 1000 points, which is a lot and a lot of playing and huge budget to be spend. So the higher bet you place the faster you will unlock the bonus round, while laying with minimum bets, won't take you anywhere or you will be playing with hours till the bonus round will be triggered. The sport car is the bonus symbol, which when the bonus round will be unlock, when you have those 1000 points, will take you on another place where you will be given chance to pick a car, so your reward will depend on what place you will take in that car race.
The main symbols in this slot are the Racing Cap, Oil Can, Racing Tire, Air Impact Gun, Crew Chief, 1st Prize Trophy, Driver, Checkered Flag, and Formula XWheel. There is a wild symbol on this game which is the Tachometer, which will substitutes all the symbols on the reels except then scatter and the Jackpot symbols. The Scatter symbols are the Girl, so getting tree of them will award you with 10 free spins, 4 of them 25 free spins and the last id 5 of them which will reward you with 100 free spins.
I have never won 100 free spins, just because I found the free spins feature is a bit hard to be triggered, so barely can trigger 10 free spins and the multiplier is X 2 your bet. Nice interesting slot, but I don't like the bonus rounds, just because they are really hard to be triggered, while I play with minimum bet.