Uses Perlin noise to generate a random looking landscape. Left/Right to scroll through the landscape. Press space to generate a new universe. There are four octaves of noise used to generate the landscape. By default each octave is twice the frequency and half the amplitude of the previous one, but you can modify that with the sliders to suit your needs. interpolation will be linear when 0 and sine wave interpolation when 1
For a 3D landscape generated from Perlin noise you can look here: http://scratch.mit.edu/projects/33993248/ For a game made from a similar engine you can look here: http://scratch.mit.edu/projects/24451694/