You can check my plan for this fish game if you are interesting:
https://miro.com/app/board/uXjVKTLyh1I=/
Also I am using my Ludum Dare game "Summoning Bridges" and "Icescape" for my other plan:
https://miro.com/app/board/uXjVKSLKgN0=/
So I am using jams to develop my games step by step :)