I really like this cantata. You do a lot of things really well: the bass line is nice and melodious, you have very catchy ritornello themes, the macro structure of all of your arias & sinfonias make musical sense, there's a great deal of variety between the movements in terms of the core musical ideas, and you have a great sense of rhythm - all of the pieces have an excellent driving energy. It's clear that you have the Baroque spirit in you!
The biggest thing I personally find lacking throughout is more adventurous melody and harmony writing. I find myself wanting more use of chords in first & second inversions, suspensions, seventh chords, appoggiaturas, more frequent modulations and use of chromatic chords etc. - all the usual musical devices that spice up your work and give it lots of colour (Disclaimer: having listened to Bach all my life, I am not familiar with the Italian Baroque, so perhaps this is my complaint with the idiom as a whole rather than your music specifically).
Two other definite issues: the "recitative(s)" here ought to be called "arioso(s)". Assuming this is a solo cantata, I also think the tessitura & range of your alto should be more consistent throughout the cantata. Compare what he/she has to sing in the first aria vs the last, as an example.
All of the music I compose is in the Baroque style too, so perhaps you may be interested in this?