I must say: the game really improved,
the game is getting more and more quality!
I love the in game panels!
it looks so good!
still, in the menu the buttons are not visible until f5 is pressed,
so you might want to set video mode to a higher value by default.
this might be because I am running the game in a lower resolution than the game requires.
you could implement a function that scales panels down to fit into the screen.
the level design improved, although you might want to use better textures,
and make it more logical, like avoiding floating blocks

I was unable to get up the yellow-black striped wall, but this
was just... because I am not a really good gamer

well, the game improved, I must say,
keep working on it.