Please consider changing your license to protect your work. If it's free to share, the person buying it can freely distribute it.
Your license should be something like this:
You may use these assets in any free or commercial game or app as long as the model cannot be easily extracted from the game or app.
You are not allowed to distribute or share the models on their own, they must be part of a game or app.
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They look good. I'd recommend you only go with 4 fingers - like cartoonists do - it makes the hands look less busy.