Cute little entry ! I liked that you used the theme as a gameplay mechanic, that's a good idea ^^ ! I must admit that, at first, I didn't fully read the description, and so didn't know you could use the mouse to reveal the fake platforms. That's my bad, but don't hesitate to explain that in game, in the menu or the first level ^^. However, that's a neat idea that perfectly fits the theme, so GG =) !
I liked the unusual twist on some levels, but you should move the camera accordingly once the player figured it out, it was a bit frustrating sometimes ^^'.
The jump was a little bit janky at time, sometimes I was on the ground but couldn't jump, I don't know why ^^'.
Overall that's a cool concept and a nice game, congratulations =) !