You have a nice looking site there, so please don't take the following as criticism. Here's my take on things that could be improved (as someone who spent a while in web and mobile UI development):

First load performance is important, because most of the visitors you care about only visit the site once. You can check first load performance using Chrome's developer tools (click 'network' tab, check 'disable cache', and reload the page).

With that in mind, that 1.2 MB jpeg background has to go - it takes about 2.5 seconds to load on my machine. I pulled down the image, turned the jpeg compression up until it was about 200 KB, and it still looks pretty ok on a MacBook Pro's display. Play around with it, see how much size you can shave off while maintaining the quality you desire.

You might consider adding a favicon, in case anyone bookmarks your site to come back and read it later. It helps any bookmarks (and browser tabs) stand out from the rest.

Speed the CSS transform transition thingy between pages up by 3-4x , or eliminate it entirely. There's delight the first time it happens, but by the time you've clicked through 2-3 pages, the added latency is maddening.

For the writing samples, the white-on-black feels a little hard to read, but I'm not sure how much of this is down to personal taste. You might experiment with black-on-white just for those pages. The 'Return' button doesn't actually take me back to the previous page of your site - it always goes page to the home page, which breaks the immersion a bit. I feel like it's also on the wrong side of the page, but that might be my Mac/iOS Muscle memory talking.

The transition on the game screen shots should go entirely. It's slowing the user down. I also expect next/previous controls in an image gallery - they are pretty standard, and going back to the previous screen after each image slows the user down again.

Download link should probably point to a zip file containing a Readme file, not a raw .exe. Most people have been trained by decades of viruses to never download a raw .exe file. In the same vein, record a youtube video of gameplay and embed it - most folks aren't going to download the game regardless of how it is packaged.