Cool concept for an endless runner/faller :) I liked the gnome and pickup sprites especially! I do wish there was some more build up to the speed and difficulty as it felt like how far you get was almost more based on luck than skill. Maybe having a wider area to traverse and avoid enemies would be good too, or just being able to see the pickups when it gets really dark could get you out of an otherwise impossible situation. Nice entry though!
Here's a short gameplay video of my playtest of it. Hope it helps provide you with some valuable feedback!