The white block is in your control. Use A to move it left. Use D to move it right. (there is no jumping) The black/red block is draggable by your mouse. Use it to climb up certain areas, as your player can climb on it. Your cubes are shaking? That's normal - its to prevent lag. If you want it to stop, go into both sprites and select the settings for the "fix y" block and check "run without screen refresh" on them. You will start lagging but they will stop shaking. A bug has been patched where you can drag the red cube and have the other cube have a ride. Now the draggable cube turns off its hitbox when being dragged so the player cube cannot hitch a ride. Note that the bug where you spam click really fast instead of holding the mouse down is not patched yet.
