since level 10 is harder than most all you do is wait a second drop down wait on wall awhile then jump then let your guy stand on you time your jump to double jump using him
reminds me of a game called braid maybe ever a rip off of it still great game braid was one of the most highly rated arcade games on xbox and this should be on kongregate top game :D
i beat purple knight camping on left side of the map he turns around at about one fire blast after hes dizzy simple and final boss i put on shield as soon as game starts and didn't rush upstairs