This is very nice, graphics and animations are very good.
I've some suggestions:
There is no way to skip the intro text, and it is very long and slow... not good for impatient people!
When switching to fullscreen pixels are stretched, and it doesn't look so good... I think that integer scaling depending on screen resolution would be good (i.e mine is 1680x1050)
When scrolling there is some tearing, I think that activating VSync would improve it
Anyway, great game!