AM2R stands for 'Another Metroid 2 Remake' which is the true nature of this project. In essence it's a remake of Metroid II: Return of Samus, released for Game Boy in 1991, and whose main appeal was its radical graphics that were (at the time) ahead of their days and preceded Super Metroid on Super Nintendo and Metroid: Zero Mission also remade for Game Boy Advance from the first original title designed for NES.
https://am2r-another-metroid-2-remake.en.uptodown.com/windows