Very charming! My only crit is that some of the sideways movements would have the robot’s wheels skidding. I don’t do animation (Yet) so I’m not sure how difficult it is to make changes to an animation. If possible, you might consider making the wheels round balls rather than disks.
I understand that Malaysia is a rising star in CG animation so keep up the good work: you’re in the right place! Your English is fine: your work speaks for itself.
I would tone down the background a bit so that you don’t lose the character in it. White character on a white background is hard to read and I think that if the background was slightly darker, you would get better results.