Scribbland

Scribbland is an innovative platformer game, where you use only one button to control the player (namely Left Mouse Button). To make the player move you just have to click and hold it, while if you want him to jump release said button. To move in mid-air, quickly release the button and then hold it again.
Your objective is to reach the exit while avoiding hazards and running into walls. You can play the game either in Easy Mode (You don’t get killed when you run into wall, there are less enemies but the score is lower) or Hard Mode (Running into wall kills you, there are more enemies but the score is higher). Compete for the best score and get first on the Hiscore Board!