scratch games

scratch is a programming tool/widget used by schools for usually a unit to introduce students into scripting, unfortuanately complex games lag like heck on it so last year or two ago when i made my project, i owned but it lagged so i got a low grade for it, anyways i was wondering what your experiences were with it

ma class were messing around 4 the last 3 weeks with scratch in IT lessons
most of the time we were playing the premade games and stoires made by pros (think they come with scratch)
Some are quite funny