.minefield {
    line-height:0;
    border-spacing:0;
}

.minefield td {
    padding:0;
}

#result {
  color: red;
}

.spacer {
    margin-top: 20px;
}

.Win tr td img {
  opacity: 0.2;
}

.Loose tr td img {
  opacity: 0.2;
}
.minefield {
    line-height:0;
    border-spacing:0;
}

.minefield td {
    padding:0;
}

#result {
  color: red;
}

.spacer {
    margin: 10px;
}

.Win tr td img {
  opacity: 0.2;
}

.Loose tr td img {
  opacity: 0.2;
}
Add some more margin to the .spacer
Add some more margin to the .spacer
