Hey, we're very glad you like it :) This is just a very simple trick in photoshop really, you just have to change your image mode to Grayscale, then bitmap, and just select he Halftone screen method. This is usually what is used to prepare visuals for screen printing and you can get pretty interesting results by playing around with the parameters
That's cool :D I wonder if there's a similar workflow for Krita. The halftone look really gave your game something, though it did sometimes feel like I was pixel hunting. The lower detail helps ambiguate photo backgrounds so you don't have people interacting with everything. At least I assume they were originally photos, it definitely looked like it!