Hi! Long time no see.
In general, I would say this game looks amazing and its concept is great, but there are a few things I feel like could be changed about its execution, although some of these aren't exactly applicable to the game jam setting. First of all, I understand that its a minimalist art style, but when the game revolves around staying in the dark while that 'dark' is just pure white in the game feels a bit unintuitive. I personally really like the difficulty level of the game, it makes it a bit challenging to complete, but with its simple controls quite easy to pickup. However, in certain levels, it can get quite annoying to have to wait for the guards to go to a certain point before continuing although whether to address that is your choice. The sound effects are spot on for this game I feel like, they complement nicely, but don't take away from the minimalism, but the music feels a bit to cinematic for the style. One more thing is that if you do decide to further work on the game, it could be beneficial in my opinion to push more into the museum theme as right now it does feel a bit more like a top-down platformer(? if you get what I mean), where the theme of robber doesn't really affect things that much. In conclusion, I love the art style of your game and its concept, but in certain areas I feel like they could be made to be more compatible together. Good luck on your submission! :D