"English typing practice - Acid rain" is a typing practice game. The concept is like this. A word moving from top to bottom is a drop of acid rain. You have to type the word so that a drop of acid rain cannot reach to the tower. If acid rain hits the tower or the bottom, which is sea, the tower will be rusted. How much the tower rusted is represented by the heart gauge at the left top corner. As the level goes up, the acid rain dropping speed will be increased. Therefore, you need to type fast