Amazing artstyle and a really cool idea! The menu & credits were really nice, and I liked the music too :) Some suggestions:
- It was hard to know where my mouse was pointed. Maybe have a small dot as a cross hair in the center of the screen so the player knows where they're clicking
- I found it difficult to catch a thief in time, especially if they stole something nearby to the exit. Maybe instead of having to click the walkie-talkie you could also e.g. press space? That might help the player be quicker