Bomb Frog

[Chris2Balls [:B]]

I think you took symbols and my example a bit too literally, but your idea works, that's the bottom line. It's important that this object is visible to the player, because for now some of the tones blend into the background (I'm thinking of the bomb, and the darker hues of grey); remember what I said about prioritisation.
The green creature lacks volume. Why so? Because of the way you shaded it. Why does the shading make it look flat? Because of the way you distributed the light onto the creature. This may be due to you being unsure of how the creature looks in three dimensions, it may be due to you not knowing what impact light will have on the volume. Either way I don't understand your creature's volume so I'll let you work on it so you can clarify.
What importance does this creature have in the game?