I recently exported my game to Scirra Arcade here https://www.scirra.com/arcade/action-games/bounce-25-36135.
The moment you start moving the frames drop heavily, this never happened to my in the original preview file here:https://drive.google.com/open?id=1f6g7rCu5JxEfMhGH5GUB2r4tVEMVNwpr