It's fine, I wasn't exactly feeling uncomfortable, it was more disappointment in how boring companies are.
I know about AM2R, not as much detail as you explained but still.
I don't think this will be the same case though
(especially after the metroid has been removed)
for multiple reasons:
1 - I'm not calling this metroid or trying to make it seem like an actual metroid game.
2 - All my graphics are original and isn't made to completely look like metroid. (although with obvious similarities)
Even the actual metroid easter egg sprite was made by me but that one is too similar so it's going away as mentioned before.
So I don't really see how this could be a victim of copyright issues when everything is original.
But with all of that being said, this game is not done and will receive numerous changes over time so other things may or may not be removed/changed as well.