I really like the level design. I won't spoil it but I found the orb at the beginning of the game.
Places you could work on it more:
- Play with the movement of the character a little more, I think their movement feels just a little too slow, especially the fall and jump. Generally with platformers I find a good idea is to have a high jump force and a high gravity. It feels very responsive/snappy that way - the player rises fast and falls fast.
- The camera, like you mention in your description. I think the main issue is with the smoothing on the camera. I think you probably want to turn the smoothTime down, by maybe half. That way the camera tracks the player more quickly. Another option is to only use smoothing on the X-axis. Just increasing the camera size is another solution.
Really good though! Could maybe use some kind of enemy flying around, or another type of platform to compliment the bouncy ones, just for variety