Thanks Xavier! I think that's because the bombs have to snap to a grid position, but your movement doesn't. I haven't quite figured out the best way to attack that problem, which I think becomes a little more annoying when you start being able to move faster, but in the meantime you can always try holding the space bar to visualise where the bomb would land. I think over time you'll be able to anticipate where it'll go. Thanks for the feedback!