Combine lemon juice and olive oil. Layer zucchini to cover the bottom of a platter. Season with salt and pepper and drizzle with olive oil and lemon dressing. Repeat layering zucchini, salt, pepper, and dressing until all zucchini is used up. Marinate for at least 15 minutes. Right before serving, top with fresh arugula, shaved Parmesan, and herb flowers.