Quite a good idea but like other commenters have said it's a bit short, after you catch the thief you can't seem to continue. Pretty good for 48 hours though and i'll deffinately be checking back after the jam to try out any updates/new levels.
One criticism was that it felt a bit slow and it took me a minute to realise I could move more than one guard, but their movement speed was a little on the slow side.