You'll never be able to do anything creatively if you second-guess yourself and worry about how people will receive what you make, or what else is out there that's similar to your stuff.

Even when one game is objectively better than another (as in, everything one does the other does equally well or better), some people can still prefer the worse one because it does something different that they find more enjoyable.
E.g. I admit that I suck at fighting games, but I can recognize that Street Fighter IV is overall better designed than Ultimate Marvel vs. Capcom 3. It's better balanced and it's not possible to do stupid shit like infinite juggles. Yet I like UMvC 3 better because I like the characters better, and it's just more fun for me.

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>>5415
thank you fren, you are right.

All art is imitation friend
If you're just developing as a hobby, keep going.
If you're hoping to commercialise your project, then it's a bit trickier, and you might want to diverge from them. Or you can just make your game better than theirs, or have yours release first, or develop the community around it better.
The sad fact is you almost certainly won't make money from your game anyway, because virtually nobody does. If it's a hobby or portfolio thing, then ignore them and do what you want.

>>5415
The way I see it, if your game is fun to play, then people will want to play it. Shit I thought the zombie genre was saturated to hell and back, but then 7 Days to Die comes out and everybody played it no problem