The problem is it's a one-trick pony. 1 sweeper and you are top-decking the rest of the game because you played your limited hand. Most hands you'll hit nothing but land, as you have twice as much as even conservative people play. It's…risky and will not reliably pop the combo.
Most people's decks I've seen run about 16-24 creatures, 16-24 spells/artifacts/enchantments/etc, and about 20-24 lands. Yes, that's more than 60, and the ratio depends all on what the deck does. There are many decks that don't even remotely hold to those numbers, but they have a game plan that usually allows them to handle that weird distribution of card types. The problem I mainly see is that you have no plan if you don't get Emrakul into play. Four 3/1 creatures will not carry the day, and I find a lot of games/decks where the order I want something to happen is sadly not playable in that order. I've had many decks break apart literally for that reason. Somehow it doesn't always (or even often) work how you envision it in your head. So, it's really vulnerable to not getting your
Gathering Throng in first before you can cast
Creative Technique. If it works how you planned, great, have fun, but if you don't then you are screwed.
And, while you are waiting, and your opponents are building board position, you have no way to slow them. Emrakul fixes a lot of board position problems once he starts attacking, but only one player at a time, and not all at once. So, even if you can survive to turn 5, what do you do when it's turn 7, 8, 9 before he/she/it can come out? So, a lot of stuff to consider if you want to stick to Emrakul. The last thing is that your friends after they see what it does, will add stuff that allows their colors to handle the shenanigans, and there are a LOT of answers to Emrakul. You can google or reddit those, and so will your friends. I hope this helps you think about some stuff...good luck!
