I just finished the Unity Tutorial for creating a simple 2D roguelike Mobile Game. Now I wanted to make my level bigger; finding or creating my own algorithm isn't the problem. My problem is that creating a game object or using a prefab for every single floor or wall tile is a bad idea. (Map 200x200 = 40000 objects). A comment under the tutorial said that and I'm incline to believe it. That much I can understand, but I can't find a alternative. What can I use besides object/prefabs?
Sidenote: I have decent programming skills, but am beginner with Unity.
The tutorial I followed: https://www.youtube.com/playlist?list=PLX2vGYjWbI0SKsNH5Rkpxvxr1dPE0Lw8F I want to make the maps there bigger, but then everything goes slow motion.