To me the contrast between the web and the nice green background works well and I like the water droplets on the web too. Personally I think the composition works Ok here bacause the web is pretty symmetrical but you could try placing the spider off centre in different places to see how that works too. I find the bright reflection on the background leaves a bit distracting, you could try shifting your position slightly or using a polariser on your lens if you have one. The focus looks a little off as well.