Interesting game, I like the concept of one character being able to only create something and the other only being able to use it. The music was also pretty catchy. The platforming movement itself was pretty fun, I enjoyed bouncing one character off the other's head and getting tons of air.
However, the gameplay was super buggy. I was never sure when I could or could not create or use rope. I was only ever able to use one rope and that was in the first room. I was able to glitch my way into several other rooms.
To improve the game, I suggest a few things. Have the red character glow or have some form of visual indicator (even on the UI) when rope can be created. Similarly have something for it blue has rope or can use it (even a rope icon over the head of blue would help). I also suggest removing the sloped walls near the level exits, it may look nice but it is possible to glitch up them.
Overall, not a bad concept and I hope you keep developing it after the jam. If you do get a post jam version up, please let me know, I'd love to play it again with some more polish!