Lovely eye-catching painting.
Aside from the bright contrasting colors on the flower making the night scene livelier I like first and foremost the sense of balance in this picture. The objects seem to be 'evenly' spread on proper places in the drawing area, also the color highlights. And I love how you keep the focus attraction on the house by shining its central part lit by moonlight and making an 'opening' to the house by 'framing' it with the surrounding plants. The way you cover half of the moon is giving an effect of calm light without being overly glowing or dominant in the scene, which is very nice.
I suppose there's nothing more to say in the technique, for this style I think you've done very well also with the composition. If there's something I'd suggest to improve is the overly bright color of the pink flower. If you tone it down I think the scene would look more realistic instead of looking like some spots of color 'splashed' on the picture. Overall though like I said you've done a great job for this style.~