Copied from ProjectSpark.com
Question: I have projectiles shooting at a wall, but they disappear before they get to the wall. How can I make them last longer and hit the wall?
Answer by Mescad
example: WHEN DO [shoot][lifetime]
By default the projectile with no lifetime tile will last 3 seconds. At the default speed that will travel approximately 30 metres.So projectiles fire at 10 metres a second or 0.333 meters a frame. Change the speed and the projectile will travel faster and therefore further in the time.
WHEN [Y][pressed] DO [shoot][at speed] // this is the default speed. Change to a higher number for a faster fireball that goes further, or a lower number to slow it down.