Our game was kind of easy but has some interesting stuff...
1. The color of the background changes little by little as you go down, and it's done in a procedural way!
2. The BIG FISH you have to take has a basic lightning shader I did. It is the first time I write a shader without copying all the code from the Internet, so I'm very happy.
3. And the code is free in GitHub! So you can take a look to it to learn the details :)
Take a look to the game: https://itch.io/jam/gmtk-2019/rate/461782