Does the "100 ∞ levels" achievement work? Because my counter is stuck at 0/100 and I've already played 50+ probably (not really counting) so I wonder if I should maybe wait a bit...

I've got a question regarding lvl 5-8. The lvl requirements stat that one aquarium with size 0.5 and 2 with size 1 are needed. After I place one boat in row 2, column 2, I've filled another 1-sized (sub-)aquarium. Placing the second boat right next to it does not add another 0.5 -sized (sub-)tank but merges both to one 1.5-sized aquarium. I understand that both water placements belong to the same 4-sized aquarium, but both "subsets" are clearly separated. So why exactly do they count as one, 1.5-sized aqua...

I am referring to hints that are a single ?, NOT {?} or -?- hints. Let me know if I understand this hint correctly: The ? hint for a row/column does not indicate anything, correct? That is, a row with the ? hint can have any amount of filled cells, even 0, and the orientation of the cells doesn't matter. If this is the case, could we have an option in the Gameplay settings to disable ? hints (as if you right-clicked the hint during gameplay, or even get rid of the ? symbol entirely so the row has no hint)...

first launch started as full screen but ever since then 1 out of 5 launches it comes up windowed instead. Never touched the setting until the bug occurred the first time.

Opened Liquidum today (I've gotten to Cthulhu in the campaign, did a few explorer levels, and have 11 hours total) and suddenly it seems I've been reverted to the 'demo' state of the game. I don't know what to do. I bought the game, never requested a refund, steam is telling me that I've purchased it and own a legal copy of the full game. I deleted the demo version a while back. It still shows me that I've 100%ed the first two sets of 8 levels, and the profile still says that I've com...