Press space and use your mouse to guide the throwing knife, click and drag the enemy boxes to a area, and drag the penceil box around to make ground, and use the water box to make water(duh), and drag the finish to where you want it.(arrow keys to move, and the up arrow to jump.)the green flag on the screen is to play your level.( CAUTION IF THIS DOES NOT WORK EDIT IT AND PLAY IT IN PRESENTION MODE!!!!!!!!!)