It's got all the components, the info on the sides of the screen, the background details tp sell it, the action being done. The colors are nice and the red barrels are a nice touch of excitement but they don't overpower the rest. I feel like it's missing some stuff in the foreground, though It's bit empty and needs more kinetic energy in my opinion. Maybe more flourish and force demonstrated in the swing would have done it.
Either way, good job on your first mockup and thanks for contributing to Pixel Day!