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Can anyone tell me how to make an upgrade for my side-scrolling space shooter? I have a lazer set to create actor and I can't get it to change to another.

Also, hi!

If I get what you are asking, you want your ship to change the create actor, effectively upgrading the weapon? To do this, you will need to use a variable. So add a variable in Global Code, by

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int weapon;

And upon the keydown event that creates the actor, make it a keydown event, script editor

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switch(weapon)
{
    case 0: // no weapon upgrades
    CreateActor("laser", "laser", "(none)", "(none)", 0, 0, false);
    break;
    case 1: // weapon upgrade 1
    CreateActor("laserV2", "laserV2", "(none)", "(none)", 0, 0, false);
    break;
}

So to upgrade your weapon, upon collision with the upgrade in the script editor.

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weapon++;