It looks well polished, and felt like a complete tiny game of its own. There's a lot of "two things are directly attached" games, but this feels unique, I don't think I've ever seen this type of elasticity play before.
Some of my complaints would be that there was sometimes levels that took a while to get through, but were easy to die within the last step, especially the last level using the moving platforms, and I found that the switches were sometimes easy to turn off/on on accident. I get the last one is pretty hard to program, especially when you need to flip the switches, maybe a radius where you have to get x distance before you can revert the switch? Might actually be more trouble than it's worth though, so I dunno.
Honestly though, the game was super fun, stretching the connection as far as possible and using it to launch myself at the speed of sound is awesome. You've made a great, fun game, congrats.