What an absolute shame. This was a great series of games. So why ruin it by adding the most annoying and overused ridiculously unrelaistic move in games today..the wall jump. Note to game desgined...ENOUG ALREADY. It was sort of a cool idea OVER A DECADE AGO. (actually...not really, it was always stupid forthe sheer asburdity of the notion that you can climb a wall like that.)But now, it is just a dumb way to add difficulty. MAYBE you can add it for a few levels. But when you make pretty much every level be wall jumping in between spikes, it jsut makes the game annoying and not worth playing. I would have thought the "Robot" games were above that sort of thing. The one star is solely for the fact that I went back and played some of the older games of the series.