Fixed:
https://dl.dropboxusercontent.com/u/80437109/SingleEnemyFire.zip
Btw, it's an extracted version of the .capx (basically a project file), since i had to edit the version info to work with r156 or whatever i have currently (seriously, we should have an updater by now) - just open the .caproj file in the folder and then you can re-save it as a .capx.
Also, you might want to look into the speed at which the dialogue appears - it was so fast for me that i couldn't read it (latest build of Firefox), furthermore, the stealth doesn't seem to work (something about pressing shift? shouldn't it decrease the player's speed?).
Good luck.