pixelSize = 5
alienSpeed = 1.5
alienSpacingX = 75
alienSpacingY = 75
alienStartX = 100
alienStartY = 60
aliensPerLine = 11
shotSpeed = 15
minimumShotDistance = 30
screenWidth = 1200
screenHeight = 750
sideBorderSize = 100
endlinePositionFromBottom = 120
scoreAreaHeight = 100
alienSideSpeed = 4