The game library supports simple single-player time-based games. The player has a number of **lives** and a **score**. The game has a number of **levels** and a **countdown clock**. The general goal of a game will be to achieve a top score before time runs out or the number of lives goes to zero.
## Touch Develop
The code below shows a simple game where the user gets to press the button ``A`` as much times as possible in 10 seconds.
If the `life` reaches zero or the time expires (see countdown), the game enters the **game over** mode. When the game is over, `game->is running` returns false
* check if the game still running.
```
export function isRunning() : boolean
```
Indicates if the game is display the game over sequence.
```
export function isGameOver() : boolean
```
You can also end the game by calling the `game -> game over` function:
```
export function gameOver()
```
### Score
When a player achieves a goal, you can increase the game score
[Add Point to Score](/microbit/js/game-library/add-point-to-score)
* add score points to the current score
```
export function addScore(points: number)
```
[Score](/microbit/js/game-library/score)
* set the current score to a particular value.
```
export function setScore(value: number)
```
* get the current score value
```
export function score() : number
```
### Life
Manage the player lives. When the life count reaches 0 or less, the game is over.
* remove one or more lives
```
export function removeLife(life: number)
```
* add lives
```
export function addLife(lives: number)
```
* set the life to a particular value
```
export function setLife(value: number)
```
* get the current life value
```
export function life() : number
```
### Levels
When the game increases in difficulty, you can increase the level and use that value in your game logic.
* increase the level by 1
```
export function levelUp()
```
* get the current level
```
export function level() : number
```
### Time
The game immediately starts tracking the time from the moment the device started.
* get the current time
```
export function currentTime() : number
```
You can start the time again by using `game->start stopwatch`.
* start the game timer
```
game.startStopwatch()
```
### Blink
Reports the blink duration of a `sprite` .
```
export function blink(_this: micro_bitSprites.LedSprite) : number
```
Sets the blink duration interval in milliseconds .
```
export function setBlink(sprite: micro_bitSprites.LedSprite, ms: number)
```
### Lessons
[bop it](/microbit/lessons/bop-it) | [game of chance](/microbit/lessons/game-of-chance) | [game counter](/microbit/lessons/game-counter)
