Linear Love is a short and sad love story. It is, as the title says, quite linear. You navigate through the story by pressing the arrow keys or the WASD keys. The walkthrough says that clicking will work, but it's counterintuitive (you click in the direction opposite that of where you want the text to go - see the next paragraph) and so kind of hard to use.
The navigation is unusual and took some getting used to. You're essentially moving the text "Reader One" around on the screen, even when that text appears to remain stationary in the middle. Thus, for example, in order to make the text look like it's moving down, you have to press the up arrow key.
You don't have choices to make in Linear Love, as far as I can tell. You interact with it by pressing the cursor keys to (effectively) scroll through the text.
The love story is interesting, but there's just not much to it, or much interactivity.
One of the most intriguing aspects of this game, though, occurs when (Spoiler - click to show)you right-click on the screen and select "Escape." This opens an interface of some sort where it appears you can play with snippets of other games written by the author. These all involve using the arrow keys to navigate through pieces of text, with different events triggering when different pieces of text come in contact with each other.
I played with one of these for a while and eventually found a hermit in a desert cave, and then a story about killer plants. After that I jumped off a cliff in order to die and be resurrected and obtain eternal life. And then I stopped.
I do not know if this was an intended Easter egg or a bug, but it was kind of entertaining. Also, it's a really neat mechanic and one that I hope the author makes more use of in the future.