Use the mouse to launch "electrons" at a "battery" in order to recharge it. The catch is this: the slower the electron is moving when it his the battery, the more it recharges. That's the Parabola way.
Parabola Game
Use the mouse to launch “electrons” at a “battery” in order to recharge it. The catch is this: the slower the electron is moving when it his the battery, the more it recharges. That’s the Parabola way.
