Yes, in a couple places.. the water caustics on the columns, and the fish textures, which are pretty standard texture only but with a fresnel effect that I  turn on when in highlight mode.

I'm actually in the process of redoing the fish shader to incorporate vertex animation so as to get away from the stiffer looking fish animation which uses bones.  

The light rays are just transparent cylinders with some code to animate UVs.

Thanks!, glad you like the graphics.. trying to learn some new things with DOTS as I'd like to have the background be more lively.. thinking thousands of fish would be cool!

Believe they are... implemented this game by using a lot of the stuff learned from a Unity Learn session.  I did try to offset the shader on the chameleon fish, but may need to modify my random routine..

Agreed on UI.. at the moment for jam, just a quick and dirty display to keep track. I do plan to retrofit with some cooler (and dynamic scaling) font on trying to take this further.

Thanks!, yes I plan to take a closer look at tuning difficulty.  I'd really like to try to implement this as a DOTS solution so in the distant background I can have groups of hundreds of fish swimming around for scenic purposes only.