The 'game over' screen and its text is not in the center.
Is there only one level? It is really unfortunate.
The black line is like cutting when approaching the red button (as well as the other opposite side). And when you don't move at first, it doesn't appear. If we have zero life left and we move too far forward when approaching the arrow (which has a slight graphic defect in fact), we lose. With just one gear, we can activate the one where it is marked two. Otherwise the sound design is really good. But the robot image just reminds me of a French flag so it would be good to change that.