Very nice art, and I liked that the game had a lot of love put into it. From the main Menu, to the parallax backgrounds, to the mouse aiming, it felt you had a vision when making it.
I like where it's going, some feedback:
Difficulty suddenly spiked on the disappearing platforms. I wished they had a different design to differentiate them, maybe have constant distance between them and also they came kind of unexpected.
I got stuck on the second level as the platforms seem to block the jump and I kept dieing.
Very good entry overall.