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.

This is a really solid start, and the direction you were going with is clear. I really enjoyed it :)

It's good that you're self aware of taking on a big idea though haha. I look forward to seeing how much you'll be able to polish a smaller on based on how much you did of this!

I included SRC code but it’s mess I threw together quickly!
You will learn really bad practices if you do it as this !! xD
It’s really not very scalable in many ways, I just needed the systems to work for the jam.