Hold Z to grapple to the closest circle. Use the arrow keys to move your character. Advanced Controls: Press C to create a circle, or D to delete a circle. Bring your mouse to the top of the screen to edit player speed and gravity. If there are no circles in the scene, your character will grapple to the center. Deletion deletes circles based on your cursor's distance to the edge of the circle.
For better fps and slightly better graphics, go to https://turbowarp.org/1131941018?hqpen&interpolate&fps=120 A recreation of the grapple mode in bonk.io, currently only supports circles. You can use it in your own games as long as you credit me.