This is a very short piece, so I think that the material you have so far works.
The only thing I feel that makes this piece a bit "stale" is the fact that the ideas you are using are often too scalar, creating a general contrast that either the phrase is going up, or its going down. In other words, it doesn't have much of a contour, which imho, could be worked upon.
Also, the back and fourth motion between some contrapunctal measures agains some very homofonic ones makes the whole thing sound a bit "hasty" to my ears. Its like you're swaying between different ideas without getting to the core of neither of them.
As I said, as this is a very short piece it doesn't have much space for development altogether, so my feedback falls a bit flat, but that's what I felt while listening to it.