Install the Java Development Kit (JDK) and the MySQL Community downloaded and make sure that both are working properly. On terminal (CMD for Microsoft Windows) you can type:
For JDK test: javac -version
For MySQL Community test: mysql -u root -p
Extract the TetrisInstaller.zip to your home dir (or wherever you want).
Open the Jar Executable File TetrisInstaller.jar.
Select your language and click on the Install button.
On Microsoft Windows, you can access through the shortcut in the Desktop. You can access too through the TetrisWorkspace directory created on your home path.
That is all!