A Robot Named Fight is Super Metroid with the serial numbers filed off, repainted, and turned into a Roguelite. It isn’t Metroid-inspired, it flat out copies Super Metroid’s mechanics and design ideas, changed just enough graphically to not pull a C&D from Nintendo.
The Roguelite elements primarily are permadeath, randomized room layouts, and randomized item placements. The game apparently has a relatively large pool of “upgrades” to draw from to use as keys for its various “gates”. (For example, there are gates that are blocked by vines. Your run might have you finding a flamethrower sub-weapon, or you might instead encounter an upgrade that turns your regular shot into a flame shot.)
During play, you can collect scrap from enemies. You can find allies where you can spend that scrap for some benefit, such as acquiring completed maps of an area or building an assisting drone that will accompany you. These do not carry over between runs.
While it apes Super Metroid relentlessly, it doesn’t quite have the same magic. You will recognize repeated room layouts quickly, and the map will be a bit of a rambling affair. Boss designs aren’t exactly inspired. The biggest issue, which isn’t a game play matter, is simply the artwork. Super Metroid was a colorful game. A Robot Named Fight is a brown game. It has color, I just remember “brown” and “dull enemy design” though. The enemies appear to be globs of meat/flesh. (I admit that I skipped the story intro, so I don’t know what it presents them as.) They lack both the color and the character of Super Metroid’s bestiary (while hitting the bases of "that’s ARNF’s version of a Skree, that’s a Zoomer, that’s a Chozo, …)
Still, if you really like Super Metroid, it may be worth checking out A Robot Named Fight.