Needs work
Now I reckon you need to improve two things, before this game should be a good game and one to enjoy. As said the screen moves to slow and even though I got about 200 meters, your speed of swinging goes to slower and slower to a point your just hanging and can do nothing but drop and die... this is very frustrating. It should be better if the ninja can create a sort a swinging motion by rocking his body, so you always have a minimum speed.
So overal, good concept, but needs a little work before I would allow it on newgrounds (neutral aura myself, for clarification)