Nice game, the tutorial is clear and the fish are very polite. 

I earned the 5K but then the game would not count my decorations towards the next objective so I couldn't progress any further. Perhaps that was the end of the demo.

It would be nice if hovering over a resource in the upgrade tree highlighted what upgrades require it. Also, sapphires seem a lot more useful to begin with compared to emeralds.

I'm not sure what else to suggest at this stage, it probably needs more small goals along the way because 5K is a bit steep and a lot of upgrades seem useful, but only much later when your base income is larger so small percentage increases are worth the unlock cost.

Keep up the good work.

Not too passionate about idle games, especially if there are dead moments when there isn't much to micromanage.
is simple enough but felt the game slowed down considerably when it asked to earn 5k dollars

Really impressive stuff! I'm getting strong Seaman (1999) vibes from this (although that is the only game I've ever played). The addictive number-go-up loop was already sinking it's fangs into my brain (in a good way). I did feel that the vibe of this game could use a bit of iteration. I think it was not really quirky enough (like Seaman) or not really cute enough (like a gacha/anime game). I also felt since the conceit of the game is fish with anime girl faces that I really wanted to see their faces/reactions to things a bit more. In something like Viva Pinata, the creatures have big cute faces that are easy to see while they react to things. I think giving the fish a little bit of story or even potentially dialogue could help with this. Overall though this is looking really good and I'm keen to see you finish it!

• first fish to adult was slow, there isnt much else to do so i was just staring at the screen and randomly feeding
• is my fizzy guppy supposed to be spinning in a circle? imassuming its because shes in the mine
• theres a weird.. blur over the game? everything is kind of distorted or bloomed out. i think its because im looking through the glas
• does the different feeds do anything? would be cool if they mutated based on what they eat
• wish i could more easily see what the upgrades require than clicking on them, hovering would be better
• in the mines.. i cant see what fish produces how much? like who has the most speed
• you need to look into being able to pin it to the desk stop or similar, as i did with Desk Space, its one of those games that would do great with running in the bg as you do other stuff
• the progress to get gems is reaaaaallly slow. unless im doing something wrong
• took me a while to realize i could click the money making items
• took me even longer to realize i could buy multiple of the same items
• sometimes i couldnt click on things because a fish was spinning infront of it
• just experience from desk space, make the first 20ish min really smooth and nice progress, then you can slowdown but be careful of slowing down too much and hitting a wall, save that until 60-90min part.

good job!