I can't complete the "save the rat" game.

Hint 1 of 9:

The rat must ding the bell.

Hint 2 of 9:

The buttons on the side activate parts of the game.

Hint 3 of 9:

Launch the rat.

Hint 4 of 9:

First, press the left button.

Hint 5 of 9:

Second, press the left button.

Hint 6 of 9:

Third, press the left button.

Hint 7 of 9:

Fourth, press the left button.

Hint 8 of 9:

Third, press the right button.

Hint 9 of 9:

Wait until the piece under the moving belt is in the right direction. When
the rat is on the belt: First right button.