Sell button needs a confirm prompt! I was upgrading units when I accidentally clicked the ok button (for assigning stats) twice and the unit was sold. Now I have to redo the mission to get it back (I save before missions, not after).
It seems like you just took the swf from http://inflashstudios.com/minesweeper/tutorial.aspx and uploaded it.
It's fine if you follow a tutorial and add your own things, but simply taking the SWF is unacceptable. (I highly doubt that you'd keep the logo there if you actually wrote it.) Flagged.
Does this game use 2-byte integers? Because the comments suggest so... also, your current map position should be saved so that you don't have to travel back.
I don't know if it's just me, but I can't beat level 3. Over the course of the level, I got 3 springs, 17 gears, and 0 motors. Thanks to this, I could only build 1 tomato launcher, with the rest being airguns. I don't know about you, but this made the game nearly impossible. I like CeruleanDragon's proposal -- that resources be allowed to be converted. This is, to me, no fun. 2/5.
If you can't get the gem from the third bonus room (i.e. you followed a walkthrough and the level was updated) then watch this: http://www.youtube.com/watch?v=hCpnN_ejghE
Interestingly, if the zombies pass the civilians, they will never return to kill them. Also - I thought "Infection Time" was how long an infected human will survive, not how long it takes to infect. >_>