I think it's quite a good quartet, good melodic material that is easy to remember and latch onto. some pointers:
- There is quite a lot of instances where there is a clear clash in registers which makes it very hard to distinguish the foreground from the background. Try to separate the registers more. It's also partly down to the dynamics markings
- I think it would be better to make the semiquavers slurred, for the intended effect that I'm guessing you're going for.
- Particularly like the idea at bar 19-20! However, the development of the motif can be improved, the second iteration doesn't draw me in nearly as much
- Transitions between pizz and arco and back a bit too rushed at this tempo