More small changes

A "level" column has been added to the high score table so players can keep track of how far they have come in the game.

The space for a player's name in the table has been increased to four characters.

In the animation after each game start, the monkey grunts. But it still doesn't jump to the left (only after loading the game or in the repeating introduction).

A small error in the sound of falling girders after each game start is fixed.