If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Your aim is to sent the love letter to the Girl in the hostel. For that you should throw the paper rocket in the correct angle with the correct power. Click and drag to set the angle. Release the mouse when power meter reaches correct power. You have 5 attempts to reach the target Maximum points for hitting the target in less attempts.
This game is played with mouse only.