Thanks for the feedback! Alpha 0.0.3 is pretty old (dating back to September). Since then I've added more levels and updated the animations. There's just so many animations that I end up chipping away at it--revising a few at a time. I ended up studying the sprite work in several DOS games, many of which had half-tile movement increments. That might be where that feeling is coming from. Most of the animations play at 8 or 10 FPS. A few, such as running, play at a faster rate.