The achievements refer to "perfect" scores rather than "target" scores, but I assume they really just count targets? At first I thought some more optimal solutions were missed by the devs, but having found so many, I guess it's intentional. Perhaps the a...

It's the #5 in the warehouse level. The problem is text seems to start disappearing. This is the first level in which I start getting variables. It's like there's an invisible shape that cuts out the text. This is also effects the menu as well. In fact, after further testing, rebooting the game the info boxes that appear to explain the new methods are fine but the menu is messed up. It's text is gone. I'm running mac os 10.13.4 1440x900...

I think my son should play it.

Is there any chance for linux version?

I saw in the stream people drag and drop, I absolutely hate that. Can you use hotkeys WASD, Q/E, or similar?