Escape Game - Drainage System

Assume that you were going for a walk and accidentally you stepped on the manhole which was left open and fell in the underground drainage system. Now, you are inside the drainage tunnel and you are searching for the exit point. You have been searching for the exit for quite some time. But you are not able to locate it. You have lost the patience and very desperate to escape. So you must try your best to find the important clues and things and make use of them in the right manner thereby you can solve the puzzles and escape from the drainage system. Have fun!