There are two things in particular about this that stand out to me. The first is the colours. They are so alive and vibrant in this. It's almost as if every colour was planned to bleed into the next. It's very effective and stunning.
The next part I love is the composition. I really like the use of shapes and blocking off parts of the frame in order to focus in on the middle. It's a very effective choice. In some respects it reminds me of a watercolour painting with how the colour's act in particular.