What is the requirement "see the devs"? I tried looking at the credits, but looks like it's not that what it is required to do.

Runs through the splash screens and then crashes to desktop. Please help

I just got all solutions (found the last missing "official" solution), but I already had more solutions on one of the other levels than devs anticipated. When the game displayed the "Wow..." congratulatory message, there was a menu with "Replay", "Level Select" and "Main Menu", but none of them were clickable. I got the "100%" and "100+" achievements at the same time. Had to Alt+F4 to get out of there....

Anyone knows a way to complete it without using the three objects? Trying to find the secondary solution without success.

I get through the splash screens, onto the main menu, everything seems to be working, but for some reason when I press "Play", it simply plays a little chime and stays in the main menu.