Aim the gun to get the missile to hit a green area. If a missile hits blue it will just disappear. If it hits brown or red it will bounce. You can raise or lower the gun barrel with the up/down arrow keys or click on the black semi-circle - the rear of the gun will turn to the clicked direction so clicking higher up lowers the aim. Click on the gun itself to show the gun angle which may be useful for trickier levels. In the early levels the guns just fires automatically but in later levels you click a button to fire.
All my idea and coding. If anyone wants to remix and create their own levels this should be easy as long as the correct colours are used for the different lines (horizontal, vertical and two diagonals) as the missiles just react to the colour they've touched. Whether I add more levels may depend on what response, if any, I get!
