It is rather common in scrolling shooter games to find power-ups that give the player extra fire power, repair the damage, give extra points, give an extra plane, etc. Such power-ups can appear
when the player shoots a plane or they might simply be encountered during the flying.
For example, you can have a special fire bonus (ability to shoot more bullets) when the player reaches a score of 50 and another one when he
reaches 100 points. In a proper game you'd make it more like 400 and 1000 but we want it to be easy for testing.
Go into the main plane's Space Bar event. The default is 15 for the alarm after shooting...
Add a Test Score action (if the score > 50). If so we'll set the Alarm to 10 (bit faster), otherwise the Alarm will be the
normal amount we had.
Add Start & End blocks around the new Alarm action like this...
So it now looks like this...