I'm always a little wary of these Ant games as I'm never quite sure whether the low-effort presentation will actually cleverly hide a well-constructed game, or if it will play as bad as it looks. It's a gamble, and in the case of Fat Fish Aquarium, I really wanted to like this game as it made a very solid impression with its goofy yet well-made retro Windows aesthetic and nice little touches like being able to click on the fish on the main menu. Gameplay looked like it was similar to idlers like Insaniquarium which I enjoyed, so I thought I won the gamble and was experiencing one of the great Ant games: I was all set for fun!
As the gameplay went on, however, I found myself feeling once again that I had been tricked, duped, and bamboozled. Yes, the gameplay did seem to be somewhat similar to Insaniquarium at a glance with its money generation through feeding the fish, but it was lacking all of the interesting management and strategy, and worst of all, the progression was criminally slow, like even worse than the progression of trying to play a free mobile game without spending money. I spent 10 minutes with the game and in that time, I wasn't even able to acquire enough money to buy a single other fish: call me impatient, but I don't feel like I should've had to wait even 2 minutes for such a simple thing to happen! It was just ball-achingly boring to only be able to wait on my single fish to generate anything, even worse since all I could do as a player was feed it and listen to its one single om-nom-nom soundbite over and over.
If I were to try and be nice, I suppose there could be the argument that the slower pace makes this more like a true idler game: something you leave on your second monitor as you do something else and only check on it every now and then, similar to a real fish tank. Unfortunately I don't think it works in this manner either as the amount of atmosphere and ambiance and simulation that the aquarium provides is very shallow, what with its repetitive and minimal variance in sounds, braindead AI and lack of random events.
So yeah: nice first impression, but it was all style over substance as I felt like the game lacked any fun mechanics or depth, and to put insult to injury, it progressed at a speed where I would expect the heat death of the universe to happen before I would be able to get all of the achievements.