Right or wrong is relative, unfortunately -- and this is especially true when you only have 3 colors present.
You'd have to give more context to what the rest of the game's assets look like before it's possible to help you. Perhaps some calm water? Some rocks/characters? Anything to help us identify the style of the game visually. It may need more detail. It may need less detail.
Without something to anchor us toward what you're going for, there's no way for us to know what you need.
It looks like a convincing enough waterfall splash area, assuming this is the one tile where a wide-ish waterfall less than the size of this image width-wise was dripping/sprinkling into. I wouldn't use it for a heavy flow though, as you'd need more splashback for that. That's about all I can offer with what I see. Sorry.