.dog
  .dog__emoji 🐶
.ball ⚽️

html
body
  background linear-gradient(32deg, #00b16a, #3fc380)
  min-height 100vh
  display flex
  align-items center
  justify-content center
  cursor none

.dog
.ball
  position absolute
  transform translate(calc(var(--x) * 1px), calc(var(--y) * 1px))

.dog
  &__emoji
    animation excite .05s infinite alternate
  font-size 4rem
  transition transform .5s .5s cubic-bezier(.69,1.46,1,1.26)

.ball
  font-size 1.5rem
  transition transform 0s
  
@keyframes excite
  0%
    transform translateY(5%)
  100%
    transform translateY(-5%)

const ROOT = document.documentElement
const update = (e) => {
  ROOT.style.setProperty('--x', e.x - innerWidth / 2)
  ROOT.style.setProperty('--y', e.y - innerHeight / 2)
}
window.addEventListener('mousemove', update)