how big is the map tho?
No matter how far you go, you will never reach the end. :P
On a more technical note: The world is stored in chunks of several blocks and new chunks are only created when you place blocks in them. I'm not sure about the web version, but the desktop version stores the positions in 32bit, meaning at roughly 2 billion blocks from the starting location, the game would crash. But before that you would most likely see massive slowdowns (since all chunks are kept in memory) and/or a lot of graphical glitches (due to floating point imprecision) similar to what happens when you go too far in e.g. minecraft (You can look it up by the name of "Far Lands").
So, for all intents and purposes, the map is infinite.
I see, can you guys make new games about tetris like this, but can it be finishable? :x because i played the game sooo long, every time i placed a block wrongly, i started over by closing and opening the game, anyways, i'm trying your new games right now. You guys deserve to have more players at least. And PLZ make new tetris based puzzle games!!!