If you find this game too hard you might want to try the Beginner version by clicking the link below. If you find it too easy try the Expert version below or the regular Slope version.
Use the coordinate pairs on each button to calculate the slope of the line they are on. Choose the button that matches the number in a barrel and shoot the barrel to destroy it. Be careful calculating the slope and aiming as there is limited ammo. There are 25 levels for you to complete without any time limit. The Advanced version has both positive and negative slopes and the starting coordinate pair is the origin (0,0).
To shoot the cannon, you'll need to load it with a "coordinate pair slope shot" and then hold down the left mouse button or your finger to aim and set power. Release to fire the cannon. There's also a video available via the Video icon on the main menu that shows solutions to all of the levels in case you get stuck.
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