A straight animation slightly downwards

Trying to do a simple gif where a object are moving in a straight line slightly downwards. My problem is that the object is not doing so smoothly. Some advice to do this would be appreciated.
link to zip file of project

For your example I would create the animation using a larger scene ~650px and then scale it down when you export the gif (at the bottom of the save panel you can adjust the size of the export). This should result in smoother gifs.


That worked out great, didn’t think about that possibility =)

The result