My project is based on the parachute jump of Rozov on Mount Everest. I tried to work with the actual proportions in the game, following the height of the character set to every 50 pixels equals 1 meter and used the scroll bar to build the mountain with actual height in pixels.  I used a bit of physics to calculate the speed of fall, with simulated wind direction and random intensity and calculated the time required to reduce speed before landing.  I developed and designed the game in about 12 hours. Not tested in other browsers, developed exclusively for Chrome.