I'm at a point in the game I can't advance from. Are there dead ends in this game? It's where I fell into a room in a waterworks(?), killed the flying bots, moved the barrels down & stacked them up(much ado) to get in the big pipe to go to another water filled room with a ladder to nowhere & crates & big spools under the water which I stacked up to get back in the big pipe. There are bars dividing this & another room from which there seems no escape. What am I missing? Is there a way out?