It's a cool drawing! Could be a poster! The framing really works but ofcourse there's room for improvement (as always). You want to improve your hatching so that's the first step in improving It depends a bit on what style you wanna go for. If it's very graphical like a poster then it can be flatter designed. But maybe you wanna show more depth. Then you gotto treat the environment as a 3D shape. So I drew a box with 1 point perspective. Then just check brick references and draw them on the perspective. I found some references for the rendering. Check etherington brothers for quick tutorials on linework or Ian Mcque's line drawings. Keep the paper white where the light hits. Maybe your light is coming from the back of the tunnel. But to keep it simple just keep the light from the top. Check out the right references and use them as studies. Then apply it to your own work :)
