.center{text-align:center}
#space-invaders {
  margin: 0 auto;
  display: block;
  background: white
}
t2 {
  position: relative;
  text-transform: uppercase;
  letter-spacing: 6px;
  font-size: 22px;
  text-align: center;
  font-weight: 900;
  text-decoration: none;
  color: black;
  position: absolute;
  left: 38.5%;
  background-size: 120% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  -moz-background-clip: text;
  -moz-text-fill-color: transparent;
  -ms-background-clip: text;
  -ms-text-fill-color: transparent;
  background-clip: text;
  background-color: #000000;
  animation: 0.2s shake infinite alternate;
}

@keyframes shake {
  0% { left: 38.43%; }
  2.5% { left: 38.57%; }
  5% { left: 38.43%; }
  7.5% { left: 38.57%; }
  10% { left: 38.43%; }
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  25% { left: 38.43%; }
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  30% { left: 38.43%; }
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  35% { left: 38.43%; }
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  40% { left: 38.43%; }
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  45% { left: 38.43%; }
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  50% { left: 38.43%; }
  52.5% { left: 38.57%; }
  /*55% { left: 38.43%; }
  57.5% { left: 38.57%; }
  60% { left: 38.43%; }
  62.5% { left: 38.57%; }
  65% { left: 38.43%; }
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  75% { left: 38.43%; }
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  80% { left: 38.43%; }
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  85% { left: 38.43%; }
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  92.5% { left: 38.57%; }
  95% { left: 38.43%; }
  97.5% { left: 38.57%; }
  100% { left: 38.43%; } */
}