the input system is really annoying, if i'm pressing right and suddendly i want to go left, i have to release right and press left again, or else it doesn't detect the input, same goes for everything else,
Sorry, but this problem is probably something with your keyboard or something else, as we have already tested the game several times, and for us there is no problem with the inputs. Also, you are the first person to report this.
Other point, you said "if i'm pressing right and suddendly i want to go left, i have to release right and press left again", I didn't undertand what you wanted to meant by that, that is not how platforming games are supposed to be?