Hey there, the genius developer mentioned in the description here! Since I accidentally flipped the comparison between the previous high score and the new score, only the first score you get will be registered to the leaderboard. A temporary fix is opening an incognito tab or playing on a different device, to trick the leaderboard into thinking you’re someone else. That allows you to set one (but once again, only one) high score again. Feel free to change your username in the settings to stay recognizable on the board!