I played: The Guardian
I played Nicole Brauer's The Guardian. It's a Flash-based sidescroller and takes about 20 minutes. (I think? I took a break in the middle.)
It suffers from some pacing problems. I hardly ever enjoy screens with slowly appearing text.
What's cool is how the scale of the game - you're a single pixel - changes how you parse the landscape. Shapes that would be irrelevant details in other games take on an active role helping/hindering you. The scale also changes the primary verb. It's mechanically identical to "jump" but the sizes and angles involved make it feel more like climbing.