huge game levels

Its is possible to make a game like terraria??? where you can dig anywhere?? youtube.com/watch

For now, spawning a high amount of tiles isn't super efficient performance wise. I did a little tetris for fun some weeks ago, and the more block you have in the layout, the slower and laggy it gets

You can see for yourself

http://dl.dropbox.com/u/23551572/C2-Games/tetris/index.html