Hello MinGry! I see that you have written a nice little piece, that i wouldn't describe as a sonatine. This is because a sonatine is Usually multi-movements Not ternary form, but instead Sonata-Allegro form, which has three distinct themes in the exposition, which goes from I-V (usually and you did that well) and also usually repeats. Then comes the development and reprise which you did well. You have a nice first theme, that actually seems to plain. The whole piece is basically just a mezzo-piano. You might have been able to develop the textures better by using more dynamics, and using more staccato maybe. You could have also had more layers of complexity. Good job on exploring a new style as a composer! Keep improving! Tristanthetristan