This game is fantastic and definitely has potential! I do have a few criticisms about the game as well as some ways to improve it. First of all, there is no clear way to crack a safe or perform any of the mechanics in it. Most things are discovered through trial and error but this does not fit into the safe. There should be some form of the tutorial the game provides so that new players can understand it and find success earlier on.
The map design is somewhat flawed, and some maps won't provide you with anything of worth with some rooms being completely impossible to gain access to. In my opinion, it should be possible to obtain every valuable item on each map (regardless of how difficult it may be to do so).
Finally, it is far too easy to accidentally lose one of your burglars. They both spawn somewhere on the outside of the map and one button press in the wrong direction will cause them to leave the scene, making some maps impossible. I believe that in replacement for fully escaping, the burglar should simply be put on standby. This means that they will wait on the outside of the map and escape automatically when the time limit is up (or when the other thief is also ready to escape. The character would still be accessible and able to move, but if placed in the "exfil area" will be able to escape.
In addition to this, a possible feature that could be added later on is a builder mode, where players can build maps for other players to try and steal from.
Other than these things, this is a great game and is a good start for what may come!