Saw your YouTube devlogs and decided to check out Please Feed The Fish.
I think this is a great looking game with a cool concept behind it. Especially for so early in the development cycle, the graphics look great. The game crashed after instantiating my first minnow the first time I ever loaded the game, but I've since had no technical problems.
A few thoughts on gameplay/things I would tweak based on my experience playing:
1) When there are many fish, they tend to swim together and tend to group, which makes clicking individual fish to check up on them difficult.
2) Also, this leads to many fish swarming the nearest food source, which means fish I'm trying to keep herbivores may eat meat, and vice versa. It might be worth coding behavior to keep minnows from eating the "wrong" food source once they're getting closer to evolving (this is generally before they start turning color).
3) This one is kinda nitpicky - For the writing, I think less is more, at least in this beginning part. "I never thought I would see the planet come back to life" and "These waters are empty, but not for long..." are a concise set up for the game before the minnow-spawning tutorial.
Being in the ultra-early stages of development, I'm curious to see where you take the game mechanics in terms of resource management and overall game feel, and I'm looking forward to seeing where you take this concept and following your devlogs on YouTube!