The slug-like movement and the flat base does look more 'correct' in that slugs and other blobby creatures do move like that.
I agree with Evil that the bobbing movement is very cheery, but I don't think that's a problem. Your characters are very cheery, and unless they have to deal with the decline of the milliner's trade and destitution I can't see why that would be a problem.
If there is a slimy villain of the piece, it might be interesting if he slid around in the manner of ProgZmax's edit.
I wouldn't worry about them looking naughty. People won't seeing it unless they're looking for it. And if they're looking for it then they're unlikely to be offended.
I agree with Evil that the bobbing movement is very cheery, but I don't think that's a problem. Your characters are very cheery, and unless they have to deal with the decline of the milliner's trade and destitution I can't see why that would be a problem.
If there is a slimy villain of the piece, it might be interesting if he slid around in the manner of ProgZmax's edit.
I wouldn't worry about them looking naughty. People won't seeing it unless they're looking for it. And if they're looking for it then they're unlikely to be offended.