Each game uses different controls, most DOS games use the keyboard arrows. Some will use the mouse.
Before starting a track, the player will be asked to answer a security question from the game's manual. The answers are here provided:
DOC-CHECK QUESTIONS AND ANSWERS
For Stunts, version 1.1 (2/12/91)
Page Line Word Question
1 12 2 ...and *destructive* stunts that can smash your car...
2 8 1 *race* on the standard track by clicking on the car...
3 2 1 *track* selection screen. Your goal is to be on it.
3 13 4 In addition, *previewing* might give you a better...
4 4 4 ...time than missing *three* pieces of regular...
4 8 1 *proper* direction. If you get on the track...
5 12 3 hit the *cables* and crash...
6 3 7 while you are driving through the *loop*...
6 5 8 ...more than *110* MPH
7 2 1 *displaying* the current car, an acceleration curve...
7 5 7 ...retail price), and a set of *buttons*.
8 5 7 Just your everyday type of vehicle. *You*...
9 3 9 Interrupted while driving with a *query*
10 3 5 ...your driving performance. This *button* is...
10 6 1 *camera* mode while in this viewing mode.
11 2 1 *directory*. Highlight the desired replay...
12 2 1 *around*, you can choose to race any one at a time.
13 4 11 ...bird's eye view of the *currently*...
14 6 1 *selected* piece is the area upon which it...