played around a little bit and i loved it, i think if you added some advanced levels where you have to optimise a DLL/query to get past, it'd be sick.

This was a lot of fun to play. In the proving ground, I would add a way for the user to be able to see the answer/what the expected input is. For example, when trying to find the max clearance level in the agency - SELECT MAX(CLEARANCE_LEVEL) FROM Agents; was not working, but there is no way to see what the input is that is expected.