thank you hechelion
I read some posts in the forum and i wonder how dealt with enemy spawning. Not just spawn enemies like a lot of tutorials i saw in YT but construct a full level.
As i know, i have two main choices :
1. Make a complete level in the scene who scrolls down to the player and activate enemies (and other prefabs if needed) just before they enter in the camera view.
pros : have a look on the level structure in the editor.
cons : place manually all prefabs at the right place in the scene.
2. Use a kind of timeline script generation (i don't know the right keyword to ask my friend google) to instanciate prefabs in a specific order based on time.
pros : I can easily create text file and test it in game. Have a direct look of what is fun to play. copy/paste interesting sequences to built a full level.
cons : At the moment, nothing because i really want to test it !!!!
I need your advices and if you have any ressources (videos, blogs ...) to make a level with timeline script generation, it will be AWESOME !!