This was such a cute and really fun game. It was incredibly satisfying to finish.
My only minor complaint is that the animal shadows were kinda hard to see sometimes and they hide at the very edges of the map. Maybe having them be a little darker would be helpful. It wasn't a big deal but it would be a nice quality of life change in my opinion.
The game was a lot of fun to play, it was kinda like a really casual real-time Pokemon game but with real animals. I liked having to get animals to produce items to get further upgrades to get bigger animals. It's a very well practiced system that you implemented really well.
The audio on the animals was great, it was easy to pinpoint their locations really well thanks to it. I found it super helpful. The music was fine but it would have been nice to have a little more or a larger variety of sounds, it just sounded like the same few notes being repeated over and over.
The graphics were very basic and low-poly but they communicated their intent well and everything made sense. I especially liked the rocket launch and the reveal at the end that actually let you see all the animals. It was a nice reveal of "Oh wow, they were all fully textured animals the entire time" it was a really nice ending to the game.
It would be cool to see the concept expanded. I'm a sucker for these types of resource management/progressive upgrade type systems. I had a lot of fun and the game was really charming and cute :)