This is painful. You haven't even bothered to use a label on the radio buttons, so my click area is larger.

But even had you done that, it would only have been mildly less painful.

Use every inch of screen real-estate available on well defined click areas, so people can rapid fire answer the questions without it becoming a mouse accuracy test.

Better yet, Ask a single question at a time, and at every mouse click, bring up the next question (again using all the screen area available, so an over-caffeinated person on a trampoline can still hit their click points easily). After the last question is clicked, automatically bring up the next picture, and start the procedure again.