Press the up, down, left, and right arrows to make the hedgehog move. When it touches a green dinosaur, your score increases by 10. When it touches a red enemy dinosaur, your score decreases by 1.
I added a few things and fixed al the bugs Without turbo mode you may see the enemy's going slower due to lag! To enable turbo mode hold down the shift key and press the green flag while you hold down shift.