"You'll have motocross for hours on end"
Super Motocross is a motocross game in which the key will be your balance and mastery of the bike on different circuits.
To begin with, you will have a motorcycle and a circuit to practice on. As you win races you'll get access to improvements to your bike until the time comes when you can change it. The game has four bikes in total. The same thing happens with the different circuits that along the different levels are opening to give way to more and more complicated races.
It's a free game you'll have a good time with. Do not download it if your operating system is Windows 7, because despite being compatible with this version the game does not work properly.