Was this intended? Controls feel way to slippery

i would like it if you could add a layer system and go through blocks to help people add secrets to their level

I try to open the game, it does not open and throws it to the desktop. Pls help.

Like you must play least 10 games to rate level, some people abuse it and people give fake rewiews to hate someone or reverse.

I suppose umbrellas are meant to open them to fall slower. But I try interact them, I try do everything, even looked on the menu to see if it's possible, and nothing. Just can't see how open an umbrella. Is even possible to open it? And if it's, how?