The object of the game is to dodge all obstacles, and then reach the diamond at the end. Be careful! Left Arrow: Left Right Arrow: Right Space Bar: Jump
Before you jump, take your finger off the arrow keys, press the space key, AND THEN press the arrow key. That is the only way to move while you are jumping. I also tested the game before sharing it, so it works, and it is possible to get to the end (not that i'm saying it's impossibly hard).