USE TURBO MODE!!!!!!!!!!!!!!!!!!!!!!!! It's not as if you have a choice! The red ball will try to get as close to the target as it can without touching the obstacle. Press space to change the appearance of the obstacle. Drag the obstacle to move it. Use the arrow keys to move the target.
Moving the target gives an almost real time position that is not very accurate and using the mouse takes longer to find the position, but gives a more reliable result. The turbo detector sometimes goes off when you use the mouse or change costume. This cannot be fixed. All made by me.