Famidash is an unofficial homebrew port of the rhythm platformer Geometry Dash to the NES. It aims to "demake" the original game while still aiming to be faithful to the original gameplay. As of version 1.2.8, it has 22 official levels ported from the original and a number of handpicked user levels, all with the original music rearranged for the NES sound chip.
FractalFusion and Walgrey collect all coins in the main levels of the game using the Platformer Mode (which changes the play style into platforming mode) and Retro Mode options (which changes the "character" from cube into Mario) in record time.