You should know that pings make me excited, and that they’re never a bad thing 
For puzzles, there are multiple ways you can do this. A fun one (I think) would take place in a office / classroom. The idea is that you need to get into someplace, but it has a passcode. You have a limited amount of time, though, and you have to search through the papers and the computer to find the code. You can use a passcode-protected door for the unlock!