In this game yo have a reactor and elemental cannons that shoot particles into the center of the reactor. You need to activate the reactor with the correct element at the correct moment. You do it pressing one of the arrow keys. The up arrow is for red (fire) particles. The right arrow is for green (earth) particles. The down arrow is for white (air) particles and the left arrow is for blue (water) particles. You need to press the arrow that corresponds to the current particle when it is inside the inner reactor circle, but before it reaches the core. If a particle hits the core you lose health. If you activate the reactor without a particle in the inner circle you get penalty points.
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