Nice job on this! Great artwork, smooth motion and physics, nice parallax, and great variety of obstacles and items. The log mechanic in particular was fun to use.
You might consider having a look-ahead on your camera and having the camera zoomed out further (or dynamically zoom out as speed picks up). The speed is part of the fun in this game, but the game became a memorization-of-pattern challenge (rather than reacting to obstacles/terrain) because I couldn't see ahead of me. When my player moved into new areas of the game, it felt like luck on my jumps if I survived.
The core of the game is great and it was fun to play -- nice!
