Sorry, but I don't think your game's graphics are good enough.
1) Waves over the enviroment is a bad idea. It looks awfull and stretches pixels at the bottom and at the top. I would recommend you to set up some kind of overlay, what lightens up at corners instead of those waves.
2) Floor textures. They don't look seamless. Maybe, you should delete texture or make it more smooth?
3) Object textures. They look pretty strange and unaesthetically. What do you think about making them more minimalistic? Not like in agar.io, keep some details, but not that many.
Mhm...I do have to agree fading that the waves do stretch the pixels, but not an overlay. God, thats like the worst way he could go. No, I think pushing to more HD (smaller pixel) textures or vector textures would be good.
2 I cant agree with. I haven't noticed any seams in it. Possibly the waves hiding the seams, which would be another reason to be avoiding overlay then.
3....Mhm, They do look a bit alien, but I think thats a bit of the charm of the program. DB2 is very indepth, but so minimalistic, and its fun to see DB robots evolve, but its not as strong on the 'graphical feedback'. I mean, I love that this new simulator is quite graphical in its way of working, even the little bit of music makes me want to stay and actually watch each cycle of my simulation...as DB2 I just generally leave in the background with graphical feedback off.
I'd say probably the strongest point of this simulator though, as far as I can see currently is its starting to bridge the gap between simulator, and game.