there's a bug that makes the D keys pauses the game, so the AWSD set is unusable by now, hope dev fix this soon
edit: just realized it's because im using different type of keyboard settings. change your unikey or whatever to english keyboard to play
it's a glitch caused by the unikey settings. normally keyboards have their keys made in english alphabet, the qwerty one, so in order for foreigners to use, we need another app to change the keybinds into what we want, unikey is somewhat a universal app vietnamese use for that. my guess is that the keybind of D( unikey on its d-đ) interferes with your codes, it can't recognize the letter đ in our alphabet so it redirect the keybind to pause the game.