Fun game. It's a good loop, I would note some points of feedback. 17 minutes.
1. Harvest power and multi harvest are the meta, there's no real point in click to harvest. To fix this, you should have some high value targets and have clicking massively boost your harvest strength so you need them.
2. Per above, no differentiation in targets. You can just float down and draw them in, there's no real point in being active.
3. No radar and a small vision, so there's no point in moving around. There's nothing to search for underwater.
4. No depth differentiation in terms of targets, so the game feels samey.
It could do with more to make it more different. E.g. suppose there were 3 targets. small, which you suck in, medium which you slowly suck in, and heavy which you can't suck in without clicking, for 1 value 2 value and 8 value. You would need to float around to get the high value sources. Also a lot of the fun of the sea is some weird targets like ships and underwater monsters.
Thanks a lot for playing and for taking the time to write this up, this is exactly the kind of feedback I was hoping for.
You're right that once harvest power and multi harvest are up, clicking stops mattering and you can just drift down and vacuum everything in. Your small / medium / heavy idea is a really clean way to fix that. Depth-specific targets and weirder finds like wrecks and sea creatures are on my wishlist too, the deep sea deserves more surprises than it has right now.
On vision: the Sonar Array upgrades do widen your view a bit, but I agree there's not much worth searching for yet, so moving around doesn't pay off. That ties right into your other points. This is going straight into my notes for the next update. Thanks again!