Impressive for the short time you spent on it. Very satisfying to look at. Good use of colors and nice effects. It's like a painting where all the saturation and light is focused on the food.
There's this semi-dogmatic design rule about how "enemies must stand out from the background". In this case I rather like that the enemies are part of the dark hostile background. It would be something different if they were as colorful and shiny as the fruits (and they're still easy enough to see for anyone who is used to play gameboy).