Leaderboard

Set your old timestamp variable to null when the game is started/restarted. this.oldTimeStamp = null; Then in your game loop function, check if it's null and if so store the provided timestamp. if (this.oldTimeStamp===null){ this.oldTimeStamp=timeStamp; } This way your game always starts out at 0 for seconds passed. Currently, your first iteration when the page loads is essentially random as it depends on how long it takes for the browser to run the first game loop after starting the page.