Store highestScore / bestScore in a game and display

[HamidByte]

At the moment it should be store in one game along with current game score.

• currentScore will be the totalScore before one loses the game then it will be reset.
• highestScore or bestScore will remain there until the website is refreshed.

Best will be to save highestScore in cloud.
When user achieve highestScore, there must be a popup congratulating for achievement.
We can create another ticket for it.

This ticket is dependent on another issue/ticket in which user must be asked to enter a name.