Hey, just for the fun of it I released a new version taking into account your suggestions. I made the stealth mission much more clear that you CAN indeed do it in stealth. And i gave the security guard more time before he notices you. Either way you will get the puzzle part no matter what but you get an extra bonus dialog if you sneak past him.
I can see how I wasn’t clear enough in the last version, so great feedback!
(If you want to test it, go to “About” menu, there you will find a “Select Stage” easter egg where you can quickly load up the SecurityRoom)