you can

Drive as many cars at once as you can

An email service you can customize

Cook and serve all the doughnuts you can

Attack the enemy tanks as fast as you can

See if you can become an assassin

The closest thing you can find to Team Fortress 2 on Android

Show off your aiming skills and shoot all the characters you can

Test your aim and see if you can roll marbles into holes

Shoot arrows at all the enemies you can see

Finally you can put your mental math skills to good use