Avoid making the painting too clichéd or derivative of other sci-fi or space-themed works, as this may detract from the originality and creativity of the composition. Also, be careful not to overuse bright colors or high contrasts, as this may overwhelm the eye and detract from the surreal atmosphere of the painting. Finally, avoid making the boat too simplistic or unrealistic in its design, as this may detract from the sense of wonder and awe evoked by the theme. Instead, strive to create a unique and imaginative vision of a boat floating in space, with a sense of beauty and elegance that captures the imagination of the viewer.