This is a neat idea for a game! I like the concept and the setting, and would love to see where it could go if you were able to finish out the game a good bit more! Just a few suggestions: Like others have already stated, a controls menu at the beginning would be a great touch! Also, the ambience audio seems to abruptly end after a little while, so you might want to set it to loop if you ever revisit the project. Also, I think the main thing this project is missing is some kind of goal. Maybe a counter somewhere that shows the remaining amount of hazmat people in the mall, giving the player a goal of eliminating the enemies would be cool. Cool entry!