3 movement sinfonia complete

Hi hope you enjoy this score its my favorite ive written

It's a good first attempt at a classical period symphony!  (I don't think it's technically a sinfonia which I believe were 3-part inventions during Bach's time).  You have the general idea and layout and feel of each of the movements down.  What you lack is actual themes/melodies.  Like the 3rd movement for example is just a bunch of arpeggios and scales.  It's all effects and no substance.  Not that symphonies weren't full of such effects such as the Mannheim Rocket or the Correli Clash.  There's also the often used hunting horn call ().  This was very Haydn-esque though.  It had the spirit of Haydn without any of his melodic charm though.  My advice is to listen to more Symphonies and in general any work by Haydn and Mozart and when you compose - to keep it simple and focus on melody.  That's my 2¢.  Thanks for sharing.

I have much of the same responses that peter has. It does sound good and functions but you need to put more emphasis with what you want the audience to hear in terms of melody and counter melodies. If i were in your shoes, I would work on some pieces with less parts until you get more of a idea of what you would like to hear out of your work. 

Also check out this article about the Mannheim school of symphonic composition:  https://en.wikipedia.org/wiki/Mannheim_school

Check out especially the section under "Musical Innovations".  They included many common symphonic devices including:  the Mannheim Crescendo, the Mannheim Rocket, the Mannheim Roller, the Mannheim Sigh, the Mannheim Birds, the Mannheim Climax, and the Grand Pause.

Edit:  Also check out some of Giovanni Battista Sammartini's Symphonies!