The game Bike Upgrade opens with the biker on a ridge. You can use the Right and Left arrow keys to move forward and backward. The track takes you through a number of slopes and sharp edges to plain lands. You have to ride over them and you are awarded extra points if you are able to flip while jumping. There is also a option called rocket thrust which can be activated by the Spacebar key. This gives you extra speed. This becomes especially handy as it enables you to save a lot of time since the game has to be completed in the shortest possible duration.