This is such a cool concept, like actually, this is awesome. Little gripe though, holy crap it's hard! We get way too little time to connect people to their destinations, especially when we have to keep track of 20 different lines coordinates and recipients. This gripe would be less so if there was more content, and thus like more time to learn and improve at the game, but currently as a proof of concept this is hard to get into. The notepad showing 4 at a time is quirky, but seriously unhelpful in the ~4 seconds we get to do all the line swapping. Also something like locking the lines for a bit when you successfully link a call would be cool to see.
I'm genuinely interested to see if you continue development, because this has a ton of potential for a unique indie story game. Excellent work for the jam!