A lot of the kids who grew up with Metroid, Super Mario Bros., and The Legend of Zelda are now older than than their creators were when those legendary Nintendo franchises were first released. Some of those kids are now videogame developers themselves. Jools Watsham of Renegade Kid is one example. He created Xeodrifter in five months, fueled by financial stress, time constraints, and a raw love of Super Metroid. You can read about his process here.
Showing your Metroid DNA on your sleeve is a blessing and a curse. It instantly communicates to the relatively large Metroid fan base that your game was made for them. It also sets the bar incredibly high. Begging for a comparison to Super Metroid is a dangerous thing. As we saw with the reaction to Other M, a disappointed Metroid fan can be an intensely spiteful force.
My guess is Xeodrifter won't inspire that kind of caustic reaction in the Metroid faithful. If it were an official Metroid game, it would rank near or above many of the other games in the franchise. As long as you go into it expecting something short and sweet, it's hard to imagine that Metroid fans will be disappointed.