Click the green flag to start. Click and drag the blue arrows off to the side to place them on the playing field. Use these arrows to change the ball's velocity when it rolls over them. Try to get the ball into the goal. Think conservatively, though, as you only have a specific number of each arrow to use (as displayed at the top of the screen). Press the spacebar to make the ball start rolling. To delete an arrow click and drag it off of the playing field. Alternatively, you can click the trash can if you want to delete all of the arrows in the playing field. Arrows with a red background are static and cannot be moved nor deleted. Also, the ball will be destroyed if it touches green walls. If the ball is rolling and it gets stuck, press q to abort.
Don't forget to love my project! If you happen to bug the arrows and you lose an arrow from your inventory, click the trash can and it will be back.