Nice expansion to the series
There was clearly more time and coding spent on this one. I think if you liked making it a game instead of a movie, you could go further by adding more action- or adventure-style interaction. For action, have things like manual reloading, more weapons, automatic fire, different enemies. For adventure, add a little story to it, have the player click on items to use in different ways. Finally, I preferred when the player had real choices, other than shoot the bad guy in time, or don't. I personally don't want to shoot a guy who's begging for his life, and given the goal of realism, I should have that option.