Some feedback from me:
The visuals are great, I love the camera effect, and the graphics are quite pretty.
You should always make sure that the player can see where they are supposed to jump to. 'Blind' jumps (where you can't see the platform you should be landing on next) are always frustrating because whether you succeed or lose is not really up to you.
I strongly recommend making sure that your game has sound and music, even if they're fairly basic. (There are plenty of resources online for free music and sounds.)