A few hints. 1: there is a map of the area including the gas mask's location, and the ladder. 2: if you look down you can see an "inventory". flares are on the left and rifle rounds are on teh right
The thing i like the most is the sense of satisfaction. For example, when your fighters are outnumbered by a lot but they manage to kill all the bombers, so the city doesn't take damage. 4 out of 5, mainly due to audio bugs( machine gun sounds not playing, the siren not playing sometimes etc)
something i found useful for when i had no pistol bullets: hit the people with the side of your car! they don't grab on when you do that. At least not in my experience.
 "Contract Wars"){kind=icon}
 "Billy the Pilot"){kind=icon}
 "Synapsis 2"){kind=icon}
 "1916 - Der Unbekannte Krieg"){kind=icon}
 "Rebuild"){kind=icon}
 "BOXGAME"){kind=icon}
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 "Tesla Death Ray"){kind=icon}
 "Music Catch 2"){kind=icon}
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 "Project Wasteland 0"){kind=icon}
 "Road of the Dead"){kind=icon}
 "Crush The Castle 2"){kind=icon}
 "Doodle God"){kind=icon}