The game is not for the easily frustrated, it's fairly hard and only the very skilled are able to actually finish the game. Don't let it ruin your otherwise bright and sunny day!
Instructions: Use your mouse to drag and throw a ball to the finish. Make sure you hit all the checkpoints before you reach the finish, you can't progress to the next level if you didn't collect them all! You can only drag and throw the ball once, if you didn't make it to the finish in one throw hit the 'space' key to quickly reset the level. Press the 'm' key to go back to the menu.
The number in the upper-right shows how many times you can bounce the ball against the sides. If you exceed this number (it will turn into a '-') you need to reset the level by pressing the space key. For a complete lay down on the gameplay please view the in-game tutorial. MAKE SURE YOU GO THROUGH THE TUTORIAL BEFORE YOU START PLAYING.
PLEASE READ: You can reset a level by pressing the space key, as it says in both the tutorial and the game description, you don't have to wait for it to stop because it simply doesn't. Another thing, when you bounce against the walls too many times (the maximum number of bounces is displayed in the upper-right) you have to reset the level. This is because people would otherwise just throw the ball really fast and it would hit all the checkpoints regardless of their aiming. I hope that clears up some confusion.