Idle Aquarium

So, first off I just ran this long enough to leave a review because you can tell they did put some effort into this and I want to live some constructive feedback. First I refunded because I play on Linux and though the "game" works I cant see the rest of my desktop. But my review is mostly based on whats here, what could be better.
First I was hoping for something aquarium like meets virtual cottage. This is 100% not it. Basically this takes up the bottom of your desktop window. I hate this. its a awful idea, I want to make the application window a certain size. then through it up on another monitor or next to another application. This would help with another issue. You cant really see whats going on and the UI is really grainy(early stages I think) This is because even on my super wide monitor its all squished down. at the bottom. THe cat thing walking across the screen is just stupid. If the developer added some achievements they would probably increase sales and give some form of completionism to the game for the players that like that.

If you can get this for under $4 probably worth playing with for a bit. hopefully I will come back to this and see its grown.

Needs a tutorial or something. How do I sell fish???

Cute application! I like having my little fish on my screen while I watch lectures.

I would like to see shrimp, crayfish and maybe crabs added to the game, and the ability to resize the tank so it takes up less of the screen.

I would also suggest having a free demo version, so people can see how the tank will fit on their screen before they purchase the app.