|greetings from the critique club
Well, first off, welcome to DPC, and congratulations on a very nice first entry!
First, I like this picture overall. The large bubble placed off center and the lighting are quite nice. I'm a bit confused with your aperture listing, but it looks as though there is an area in the top left that is not quite as sharp as the rest. this picture feels like it wants everything to be in focus for maximum impact. I don't know if you used a tripod, but you can use a tripod to stabilize the camera to close the aperture (maybe try and f/11 or something) so the top left will be as sharp as the rest of the picture.
In the big bubble, there is a bit of water or something, but it seems to be a bit ill defined. Again, I think a more close aperture will help that.
You have a lot of creativity and a good eye, and I look forward to seeing your future entries