i like this engine....
this is a clever engine man, collision across an angle is never easy to achieve...im sure one day you'll turn that into a sweet game. some easy additions could include stairs and holes in the map somwhere...and raised walls rather than just lines. i tried to construct an engine like this in flash 4 ages ago but flash 4 dosent handle many button actions too smoothly. by the time flash 5 came out ide moved onto sommin else....
keep up the good work.