You'll need to download and unzip the files onto your tablet PC. Then run:

python password.py

That's pretty much it for the software part.

For the hardware, I used some scrap PCBs and electrical tape to cover up the button and the top and bottom so it would be impossible to press anything or swipe from an edge. That way the only way to interact with it is to enter the password on the screen.

There's no wireless component; once the user enters the correct password it's up to you to open or unlock the door for them into the secret lair. The sound in the video is just a sound effect on the tablet to pretend to open the door.