If you shoot a certain angle, you can shoot at the wedge that forms when two bricks from an edge. This way you can safely assassinate any enemies you see. if there are none, just keep shooting there and move around a bit and continue until they all walk into it.
the awesome part of this game that i love is that 1.you could swoop in with the spy and save all the civs and VIP'S 2.then you could go in with a chopper and blow up everything to pieces
Recommendation: Making it so that we could actually play gluey 1 on kongregate. I hate playing on other websites, its just bad advertising so please make it so that i can play it on kongregate.