Fun short.You did ask for constructive feedback, so I wanted to add my two cents. I think any of the issues I have with this could be attributed to the speed of creation. I understand the tight deadlines you're on for the summer Animation Jams, so I can't really fault you for much.
There's an interesting mix between the plain and detailed backgrounds. You have the grass as both plain night-green and detailed to show every blade of grass (when she looks in the hole). I might suggest that if you're going back and forth between "plain" and detailed, you add the extra details to other elements in the appropriate part. For example, a few extra details on her face or hair when she's looking into the hole. I think that would add a bit to the consistency.
Other than that, no real issues. I enjoyed the dialogue and voice acting.
Good work, I look forward to future submissions!