I started playing Environmental Station Alpha (henceforth called ESA because fuck this long name) and the game is fine.
If you played Super Metroid there is nothing you haven't seen and if you haven't played neither I'd say Super Metroid is the superior game but the game is still fine, it just has a lower production value.
The game works but Metroid has better music, better graphics, better "flow" and come first so you it was original once.
One special note about graphics. While I think Metroid LOOKS better this may a matter of faste, however more than one time I failed to notice part of the background was a platform and though some background decoration was solid ground and on the worlds of Miyamoto "this is not good game design"
Still, hoping to see my 8 pixels high robot turn into a hot chick!