doubleTheNums.js

function doubleTheNums(obj) {
  const keys = Object.keys(obj)
  
  for (let index = 0; index < keys.length; index++) {
    const key = keys[index]
    const innerObj = obj[key]
    const innerObjKeys = Object.keys(innerObj)
    for (let innerIndex = 0; innerIndex < innerObjKeys.length; innerIndex++) {
      const innerObjKey = innerObjKeys[innerIndex]
      const innerObjKeyValue = innerObj[innerObjKey]
      if (typeof innerObjKeyValue === 'number') {
        innerObj[innerObjKey] = innerObj[innerObjKey] * 2
      }
    }
  }
  return obj
}

const results = {
  game1: {
    lakers: 40,
    celtics: 40,
    overtime: {
      lakers: 48,
      celtics: 58,
    },
  },
  game2: {
    lakers: 40,
    celtics: 21,
  },
  game3: {
    lakers: 12,
    celtics: 29,
  },
}

console.log(doubleTheNums(results))