The concept is really interesting and has potential in my opinion. However, these are some problems I would fix:
1. The level after the tutorial is too difficult, I almost ragequitted (and I also thought the white circle was just for decoration because I forgot I had to reach it in order to complete the level. I know, I'm dumb, but my advise is to add some sort of animation that make me look at it).
2. The chameleon is too big for the platforms, with those weird colliders jumping on them is too difficult (see also point 3)
3. You don't want to use AddForce for the jump, because then the most effective way to double jump is to press rapidly two times the jump button, making the double jump kind of useless. Instead, try to modify the y velocity of the rigidbody when the player jumps and see what happens.
That's it, I hope I gave you some useful tips if you want to keep working on this game. For a 72 hours game jam I think you did a good job, well done!