Pretty nice game! Launching yourself by stretching is really satisfying and it's fun to see how high you can go. I also like how the camera doesn't start moving until you get to a certain height because it took me a while to get the hang of launching myself and it would have been a lot more frustrating if I had the threat of the camera hanging over me while practising at the bottom.
The main problem I have with the game is that you can only stretch as far as where you click and where the end of the game screen is. It can get really annoying when you're near the bottom of the screen and you can't stretch out because it just stops as soon as your cursor goes outside the game bounds. Maybe it's better on phone? On browser at least, it's killed me more than a few times and it can feel unfair.
Other than that, great work on this! :)