When I saw the rules for this week's challenge, I had a brief thought: why not combine two of the NES' most famous platformers together?
After about ten aggregated hours' worth of work (at least two of which I spent looking at reference material to study the 'feel' of Mega Man sprites/tiles), I present you with my Mega Man-inspired interpretation of 1-1. While inspired by Mega Man sprites/tiles, I pixelled everything save for the 'P-tank' (P for Pixel of course) myself. To fit within the color limitaions, I decided to avoid enemy sprites or any items other than the P-tank, Eddie/Flip-Top, and the one-up item. While I did change around the general layout of the stage to fit with the Mega Man aesthetic (and eliminated the 'bonus' room), I tried my best to keep the 'feel' of both SMB and 1-1 within the stage itself via the layout, tile design, and coloration.
About 10 aggregated hours, 12 colors, Dawnbringer-32 palette, 99% wholly original work (I don't count the P-tank), design inspiration via numerous sprites/tilesheets covering the NES-style Mega Man games.
(NOTE: Be sure to click the image to check out the full level!)