You can adjust various settings for the Prefabs Spawner script like the velocity of the launched object, the fire rate and even the prefab that need to be destroyed if it fall forever.

You can add any prefabs you want via a list. Each prefab have it owns settings:

• Fixed rotations
• Location in the Hierarchy tab
• The offset in the Y axis
• Scale
• The tags the prefab can collide with to spawn

Also included for testing

• 1 rock from Rocks Pack - Low Poly Nature
• 1 pine from Animated Pines Pack - Low Poly Nature

Be sure to update the material of these asset depending of the Rendering Engine.