This is awesome and cute :3
Just for the heck of it though, I think you should have the sun shining in the background, but make it look a gear or something (sorta like the Japanese depiction of the sun but mechanized). Another thing, I like what you did with the background fade, but I honestly thing it looks like you're slacking off... I mean you're one of the best background artists I've seen on newgrounds, so I'm sorta disappointed that you didn't show the entire background in all of it's glory.
And now for what you actually did do... First off, the robot and the boat are really cute concepts, nice work. But it seems to me like you made the boat out of makeshift parts (I think that's a fishing rod for the sail or something I can't really tell, I mean, if it is you should use that to your advantage. I.e. string the sail through the entire fishing pole or something). The robot I don't have any criticism on, very simple and innocent, though I love the little wrench he's using xD The sea and sky are really stunning as well, though I can't help but think the clouds are a bit faded out of the picture, they don't look that natural.
Anyway, it's still great man, if you put in a bit more effort I would've given you a ten.