Lemmings CSS Animation is an interactive web experiment featuring walkers that respond to mouse input and window resizing. Users can add walkers via a button or the `walker.add()` function. The walkers exhibit physics-based movement, allowing users to drag and flick them across the screen.
A key feature is that walkers ride the surface they stand on; fast window resizing can launch them into the air. The layout adapts to window width, with content wrapping onto new rows, which can shove standing walkers. Different card types define solid boundaries: borders, boxes, buttons, images, and form fields are impassable, while text functions as a floor walkers can land on but walk through.
Text columns reflow significantly on resize, making the bottom area a long floor ideal for catching walkers that fall off short lines. The experiment demonstrates complex CSS interactions and responsive design principles through playful character movement.
Source: Hacker News · Summarized by HeadlinesBriefing