This game has so much potential! It's a great start indeed.
Graphics and gameplay are awesome, so I'll give some ideas that I have while I was playing. Sorry for my possible bad english.
-As you progress collecting stuff, you can earn more weapons or improve your stats, (speed, dmg, and stuff).
-Gathering another types of stuff, makes you enter in another areas, and that means more citizens or even police man. This idea can progress slowly into a army area, when enemys have weapons and moving vehicles.
-Skills to improve stealth techniques. This can get in to:
-Killing or not people, can possibly change your ending.
-A secret area to gather some unique stuff or upgrade, maybe?
-Invading base camps of another scientists?
I give 4.5 stars because I found this some kind of "first chapter". I wish you guys can improve the idea and make something really awesome. I wanna see Dr. Vile pwning all \o/