Nice stealth game! Really good work with the theme with the 2 brothers working together. Found a lot of games with a similar idea, but most of them focus on one of the 2 or 3 characters. Here I feel it well balanced between the small and the big one.
I enjoyed the controls, played it with a X360 Gamepad. Although sometimes I screw it up when confuse which brother was with the left and which one with the right, during a failed attempt to escape the guards.
The graphics are simple, but works fine on this kind of games.
Love the camera position on the levels, and great work with the shading when hidden behind a wall (Shader graph?)
Amazing work! Congratulations!