I liked it a lot! I will proceed to critique from a purely classical (well fine, baroque), Bach invention-head, since that's almost certainly what is expected of you in your composition class.. so nevermind if that was not your intention..
-The mode you used (Aeolian I think) is totally alien to this music, and sharpen your leading note please!
-Best to avoid beginning with a leap (esp. that of a perfect 4th.. created ambiguous tonality)
-Also best to avoid beginning with semiquavers
- After the first statement of the motive, you proceed to augment it straight away, rather than developing a contrasting counter-motive. Also augmentation of the motive is way over-used. Poor idea.
-At the point where you augment your theme later on,(b.17) it completely loses all its momentum, you can compensate for slower note values in one voice with the other quite easily. Peters out at the end leaving you kind of cold. Didnt like that.
-Random dissonances are all over the shop (Eg b.16 A struck against G) This is ok if there,s a reason why its there (eg. suspension) but these are seemingly inexplicable.
-Reduce the reliance on quartal harmony (4ths) They sound bad to a baroque person, especially with nothing underneath.
-No cadences at all as far as I can see.. This is upsetting particularly at the very end, Ic-V-I is what we want!
-Bar 4, you melodic ideas are confusing, cos you begin your motive transposed up a third, but end it in the same key as the original statement. Odd.
-General lack of direction, its kind of unclear where you're going and what you're trying to achieve harmonically. Probably due to all your modality. Also modulation is entirely absent. Take it on a journey rather than letting it stagnate in the same key all the time.
Hope that wasn't too harsh, there is a lot of baggage when you go to write stuff like this, its why Bach was the genius he was. Hope that helps somewhat.