another simple method for just a single time at the start of the game with intro messages, is to make a "Do you want to skip the intro?" scripting, if 'no', then message~display your intro messages:
<object name="game">
// blah attributes~tags~scripts
<attr name="start" type="script">
show menu ("Do you want to skip the intro?", split ("yes,no", ";"), false) {
if (result = "yes") {
msg ("You skip the intro.")
} else if (result = "no") {
// your intro message scripts
}
}
</attr>
// blah attributes~tags~scripts
</object>