way to unlock later levels

[NoSpoon]

i decided to beat this game, but in the middle of the game, all my menu changed (like this: menu_returntogame) then i thought, let me just try playing the game, but that didnt work either so i had to reinstall it.

is there a way to unlock later levels without actually beating the previous levels?

[NoSpoon]

ok i tried resinstalling it but it didnt solve the "menu" problem and the game wont start.

anyone know how to fix this?