Whomp ‛Em is a somewhat lesser known action-packed platforming game.
Although it may not seem like it, this game is somewhat similar to Mega Man in idea. There are multiple stages you can visit in any order and you gain new abilities from winning each level. Like Mega Man games, the new abilities include platform generating items which the author uses to create many shortcuts.
This movie has a full Atlas Map encode, which shows the standard encode overlaid on a zoomed out map.