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# Start Countdown
The game library #docs
The game library supports simple single-player time-based games. The general goal of a game will be to achieve a top score before time runs out of time.
## Block Editor
## 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.
```
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input.onButtonPressed(Button.A, () => {
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game.addScore(1)
})
game.startCountdown(10000)
```
### Score
When a player achieves a goal, you can increase the game score
* add score points to the current score
```
export function addScore(points: number)
```
* set the current score to a particular value.
```
export function setScore(value: number)
```
* get the current score value
```
export function score() : number
```
### Countdown
If your game has a time limit, you can start a countdown in which case `game->current time` returns the remaining time.
* start a countdown with the maximum duration of the game in milliseconds.
```
export function startCountdown(ms: number)
```
### Lessons
[bop it ](/microbit/lessons/bop-it ) | [game of chance ](/microbit/lessons/game-of-chance ) | [game counter ](/microbit/lessons/game-counter )
