The idea is really cool.
The rope needs to be visualized later of course.

You should add the feature, that the player can pull up on the rope for a limited time, until it "burts" if he takes to long to
shoot the next rope.

This way you can make an interesting timing/swing game.

Also include special objects wich are pulled by the rope, and some which move (platforms)

There should be sections where the player can rest, and where he has to make quick consecutive "swings".

Also some powerups for the ropes should be included
in the levels.