Aim the laser with maths! Set the equation of a line so the beam hits every crystal and misses every rock.
🎨 Laser colour
HOW TO PLAY
Every point on the grid has an address (x, y): x is how far across (right is +), y is how far up (up is +). The centre is (0, 0).
A line has an equation like y = 2x + 1. The slope (2) says how far the line goes up for each step right. The number on the end (1) is where it crosses the up-and-down axis.
Use − and + to change the numbers, then press FIRE! The beam must hit every crystal ◆ and miss every rock.
🌙 Night missions hide the laser until you fire, so you have to work it out first. A miss or a hint costs a star.