I thought this game seemed familiar, so I checked out your old games, and they appear to be built on the same engine. I get the impression that your games are built primarily for education and raising awareness, not for entertainment, which is fine as long as you don't neglect the entertainment factor.
This game ruined me until I figured out the correct strategy, as resources can be permanently closed off to you if you aren't prepared. But it was rather fun once I got it.
If you plan to continue developing this game engine, I recommend touching up the GUI a little, and adding music and/or sound effects. As it is, the engine is rather bare-bones.
Not long ago, a game called Water Works graced the front page of Newgrounds. It has a lot in common with your games, so I recommend checking it out if you want to know what to do with your game engine in the future.