This is the first level of the River. It can be accessed after finishing M-5.
At first this level is named F-1, but soon it is renamed as The River, part 1.
Make use of the ramp and don't jump too far away. This can cause fatality. But in some spaces there aren't any ramps, so please pay attention. Be careful and you will be able to pass the level easily.
Overall, this isn't such a difficult level.