Really nice wee game Dhouglas.
Graphics are really crisp and clean. The sounds are cool too.
Not sure if just me BUT the parallax of the layers seems to stutter... this is not frames per second problem as the rest of the game is smooth but just every so often the background layers get a bit twitchy.
I think your menu logo could do with a bit more punch. The title of the game doesn't stand out very well.
Good job over all.
Thanks for the feedback Steven, I gonna watch more attention in this details for my next games.