I just finished playing, and overall it's a very enjoyable time. the exploration is fun and the night time gimmick is creepy & interesting, but the grinding sure takes a long time, sometimes too long of a time. What makes it extra long is that I don't know what the upgrade does prior to getting it, so there are a ton of good upgrades that I skipped because I didn't think they're all that good for the price. I would love it if the shopkeepers tells you what the upgrade actually does, bonus points if they give detailed information like "+50% Breaking Efficiency" or something like that.
Second thing, I think it would be great if you implement some automation & batch processing. while you are grinding resources on one level, the bot is gathering resources at another level. It doesn't have to be bot heavy, just 3 bot (1 type for each resources) for each level would help a lot since it reduces the need to backtrack multiple times. you could also add this to the processing part that will automatically process resources like microplastic or sand and such, that way you can grind while waiting for your stuff to be process. alternatively, if you don't want a bot for that, you could have batch upgrade that lets you process a large batch at the same time instead of needing to process like 1000 microplastic at a rate of 10 every 3-4 seconds (it takes 2 hit minimum and sometimes it doesn't activate even when hit because the ball hasn't settle yet)
I like all the levels, though a minor problem I have is that the 3rd floor becomes quite annoying to traverse once you gather the resources near the lighthouse. I just end up using the unstuck button to quickly get back to the lighthouse because of how far everything became. I would like it if the size gets reduced a bit or if you could add some kind of reset button that would respawn the resources back.
Also, speaking of respawning resources back, I can't complete the card collection. excluding the fog, I'm missing 1 card from the forest which I guess is either the apple or the apple tree, but I couldn't look at the apple and the tree I've accidentally cut down before I could look at it and it won't respawn, so I'm stuck there.
These are the things that I personally find annoying in the game while playing through it, other than that it's a super fun game and something I would love to play again once it's fully released.
A TL;DR: Add automation, reduce 3rd area size, add resource respawn mechanism. please and thank you <3