Somme v.1.0

I have implemented this game for my child.
The goal of the game is to score 10.
Teddy can "eat" the numbers and the + and - signs.
Teddy will always start with the + sign.
The numbers will be added or subtracted from the total according to the sign caught.
To move the bear: press "up"; "down"; "left"; "right" on the keyboard.
Once you have the results reach the finish flag.