I'm really glad you liked what I created, but even more so that it inspired you to work on your own art style! 😊
I'm not entirely sure which first shot you mean, though! If you're talking about the background image that appears when you launch the game, before clicking Start, it's a composite made from several graphics I created in GIMP, along with an image of a 3D render of a cyborg head (that one was actually made for another project).
After you click Start, there's a sort of logo with the creator credits. That's a video rendered using TyFlow, something purely artistic that I created so I could use it as a logo across multiple projects.
And if you mean the very first actual image in the story, that's me in my garage, wearing a physical prop I built myself out of a helmet and some glued-on electronic components. The laptop in front of me is actually displaying the same image I used for the main menu background! Of course, I edited the photo afterward to hide the windows and all the other stuff that was visible in the background. 😅
I hope that answers your question, and good luck developing your own art style! :)