fun
I liked it, I didn't get thrown off (using OSX, firefox) but Bob did freeze right when I knocked the final boss off of the castle. >(
Another bug: I didn't realize you're supposed to knock the pillar down to cross, so I jumped off and died. I respawned at the room's entrance minus one life (as expected), but the enemies were back and I had low health (same as when I entered initially).
The bugs made me give you a 7.