Space runner

Purpose for player:

Gain as many points as possible within the time.

Gameplay rules:

1. Player fails the game if the score less than zero.

2. One mistake will cost 10 points and one correct operation can gain10 points.

3. Double point status will be activated if player makes 5 combos. 

4. Input the arrow keys by following the instruction and Press space when the cursors are  

right at the center of the end point.

5. Player needs to stick till the music ends to complete the game.