Thanks for the answear. i let me surprised. i saw the post from this pretty pissed user below. they should not forget, that here on itch io the most developers are working solitiare or in small group as hoppyist. (and yes - sex sells, so if someone can do money with his/her work, why not :D) so you have here many unfinished or buggy games and many projekts are abadoned before they are finished. But if you have the choice to testing or playing that for free and give a small donation later, if you like it, than is there no reason to get salty.
Many developers are thankfull if they get constructive kritik or an idea which gamemechanic triggers a unknown/known bug so they can work on it.
But hey - so is the internet XD