In this adventure you type commands in natural language (within reason, of course). To change location use GO TO ..., ENTER THE ..., LEAVE. If there are objects lying around, you can sometimes pick them up (TAKE/PICK UP ...). To see what you are carrying use INVENTORY, and EXAMINE/WHAT IS ... tells you more about an object. Things you carry can be taken into your hand (HOLD/GRAB ...) so you can use what they offer — reading texts on the smartphone, say, or scanning cards with the scanner. One command well worth remembering is LOOK AROUND. There is also a HELP command.
The CRT effects (flicker and scanlines) can be switched off with the icons in the bottom right corner.
It was built by Paweł Maziarz and yes, it is written in PowerShell ;).