Very nice first time vector Giga.
Once you get more experienced, you can make super realistic vector artworks using the blend tool. Here's a tip: never attempt to use the gradient mesh tool. Ever. It's a waste of time and what can be done with the blend tool can look just as real with less the effort. The mesh tool is almost impossible to work the way you want it to. The gradient mesh tool is just hell to get working in your favor. Here's some unfinished WIPs of what I was working on several months ago when I first attempted to use the blend tool:
Here's how my icons looked before I learned how to work with blends:
As you can see, they aren't bad, but blends create more realistic looking vector artworks.
Not all vectors have to be dull, single color fill or gradient filled artworks.
Here's some other examples of what the blend tool can do:
Super Lucky Nintendo by ~timih on deviantART
Vectorial watch by ~Tripio on deviantART
Just as good as painted raster arworks with the ability to be able to scale to higher resolutions.