There's potential here.
The animation was good overall. There were a few points where the linework was shaky and where some of the movements looked stiff, but I don't have any other complaints in that regard. You did a good job varying up the camera angle.
I think my biggest issue with this is that the lighthearted presentation and execution don't feel as though they match the more serious nature of the plot. It feels like it's consistently hovering in the void between comedy and drama, never touching one or the other. For example, I'm not sure whether the second scene is supposed to be climactic and suspenseful or playful and comedic.
Utilizing lighting and music can help a lot with this because it can drastically affects the mood. If you need music, than the audio portal is a great resource. If you don't find a song there that works, you can always ask around to see if there's a musician who will collaborate with you. In terms of lighting, using more contrast and darker, less saturated colors will help show that a scene is supposed to be more serious whereas using saturated, bright colors will make the scene look happier and more playful.
Just a voice recording tip: when you're recording, it's better to be further back from the mic and speaking louder than close to the mic. When you're too close, the mic picks up the sound of the air coming out from speaking, which makes the recording muddy, as it is here. Also, be conscious of how quickly you're speaking. It's easy to speak more quickly than you think you are, so when recording, speak a little slower than you think you should. This will help prevent the dialog from whizzing by.
It's also not advised to try and do all of the voices yourself, especially if the characters are a different gender. There's a number of voice actors here on NG who will collaborate with you. Granted, the voice of the main character did fit him, so that was good.
The dialog could use some improvement, too. It hurts the quality of any kind of writing when you say too many things in a matter-of-fact way. It's better to imply things because otherwise, it'll feel like you're stating the obvious and giving superfluous explanation of the scene. For instance, there's no reason for the character to say he finds it strange that the rabbit is talking to him because his reaction when the rabbit starts speaking gets that across enough. Along those lines, make sure you don't say the same thing twice, like when the boy says he doesn't like to lie and then the rabbit asserts that the boy lied. You could get across his reluctance to lie through facial expressions and timing, but also, you don't need to state that he lied both before and after the orb glows. You might not even need to say it all if you get across the impression of a lie in the boy's manner of speaking. The orb will put the pieces together for you.
I like the plot overall. I think it could turn out to be an interesting story. It's just that the execution could use some work.