adjust initial velocity and launch angle, then press z to launch. the penguin starts at (0, 0) and will give you the other x-intercept when he lands. press x, then input a y value, and the penguin will estimate roughly where it'll be when y is that value (dependent on current launch angle and initial velocity). press c, and input an x value, and you'll get the exact corresponding y value (dependent on current launch angle and initial velocity).
