Celeste Mario's Zap & Dash

This is by far the most technologically impressive romhack to hit the NES. Utilizing the MMC5 chip in every way possible, this game boasts flawless physics, seamless horizontal and vertical scrolling, and music that takes full advantage of the MMC5's capabilities. The physics have been completely redone, making the control of Mario feel more accurate than ever. Puzzles and rooms are well thought out, providing the optional challenge of collecting 101 moons along the way. With enough practice, anyone can obtain the immense satisfaction of completing some of the more insane puzzles, requiring you to do wall jumps/wall grabs and conserving stamina and dashes. At a point, you start to question if its actually a romhack or a homebrew. Simply amazing.