I agree that this is a great half song. Some accordion would be amazing in the French section. Also, call me a whimsical fellow, but I think somebody whistling the piano melody would sound great. To confirm, that’s human whistling, not tin.
The music has a happy care-free feel about it, which is why I like the whistling idea. There’s a nice little change of pace at the end which, although not fully formed, point towards a decent second half/bridge/outro.
I look forward to seeing where this goes!
All the best.
Matt