Hi,

I just played through the Acid Pumping scenario and filled the whole basin on the right with acid (in fact it already overflows).

Maybe relevant: As I thought the scenario would succeed as soon as I had it full I had no clonk nearby to observe.
Also, I used savegames - in case that breaks anything.

What can I do?

As a side question: Whats that building doing? I can go inside, but nothing seems to happen.

I hereby license the file screenshot_openclonk_acid_overflow.jpg under the CC-BY license

Scenario thoughts

The scenario was fun to play through even though I needed two attempts.
My working solution was to use the power of the town to pump up water into a cavern I build that was next to the crystals. Then I dug to the right and mined the gold there to buy more clonks and the iron for more pumps. From there down to the lava lake which had a dry shore on the very left where I stopped and build a wall. Then further down to the acid.
I had caverns for the acid directly above it, one at the energy crystals and one directly left of the town.
Power generation was the water and lava pumped to the lava lake above the acid. As I pumped about the same amount of lava and water the lava couldn't rise.

I was lacking earth clumps through the game and used the permanent walls instead. That had some unexpected consequences as I locked in my clonk between walls that should not have locked him. But otoh now I know how to handle the wall construction so this can be a novice problem and I could solve it by throwing stones at him to get him out.

I had some trouble making the pumps work together because if a pump is activated it only shows once how much power it would need. If you miss this you'll have to guess. If this could be shown every time the pump turns on but hasn't enough power that would be great.

The "no building" crystals are a beautiful idea that really got my mind working on how to transport the power to the left part to pump up the acid.

Nice to have would be if the hut on the right side had some meaning (like you need to gather all your clonks there to finish, it heals clonks that are inside, you can store unlimited amount of stuff there or something the like)