Looks like it's searching for light or else getting ready to flower.

Etiolated imo.

yup,reaching for the light.Do you have this inside or out?

The soil appears to be too rich and moist.

It should be a succulent or gritty mix.

It needs more light, but it won't go back to being the compact shape is should be. Take those rocks out and repot in a fast draining mix and gradually move into more light. When it grows out and the leaves are closer together, you can clip off the top few inches, let the cut end dry, and repot in your fast draining mix. Don't put those rocks back on top of the potting mix. This is a succulent, and it does not like a mix which holds too much moisture nor being watered too much.