Excellent - I like it! I like the fact that it has a good game story (helping the environment), and it's well done as well. Good animation of the walking girl.

Cool! I like it. Are you planning some kind of interaction? Maybe adding pressure, or heat? Or you could have a ceiling (a horizontal bar) that one could press down to increase the pressure and see what happens...

Cool! The sounds work for me without problems. (There is, however, a short pause when a new sound starts - such as the bullet sound - and that seem to indicate something a little strange.) Looking at what the scenario does, performance should not really be a problem.