The grass hopper is positioned fine, it's hovering around the 1/3 line which is good, decent rule of thirds framing, but I would have liked to see the whole bug. It's just a bit overexposed too, but easily fixable with a levels or highlights adjustment.
The first photo, I would have dropped the flower down a smidge in the frame, the butterfly is just a bit too close to the top of the fram.
Ladybug, is also a little to close to the edge, the flower seems a little over saturated.
All the photos seem a bit grainy, were they taken at higher ISO or closely cropped?