so i just played some more.

there are three race options:
main race
battle race
practice

main race:  compete against 5 other drivers through 5 courses with 6 rounds/maps each.  this one allows a password save, and it keeps track of high scores.

battle race:  complete the race by making 5 laps around the track in first place while trying to stay alive.  i think if you get hit 3 times by the other players' weapons, you die.

practice:  time trial mode against 5 drivers, but you only race one track at a time.

each of the 6 drivers have different accelerations, top speeds, and grips.

each driver has a specialty that can be used so many times per lap.

when you cross the finish line after each lap, you get a random item among a clock, nitro, skull, star, or cash.

the clock stops the other drivers for 5 seconds.  the nitro gives you a speed burst.  the skull slows the other drivers down by shaking them for 5 seconds pushing them down ramps.  the star gives you higher top speed and acceleration and invincibility, which can smash other drivers.

the cash can be used at the end of each track plus the bonus money for rank to upgrade your vehicle.

there are slides that whip the car to the left or ride of the track with L or R.

a giant crane hand tows you out of the deep water and mud.

as you can see, it's a total rip of mario kart, but it's still enjoyable.  you guys should download the rom.