Updated solution:
Level 12 has a teleporter (reported by many others) that you can walk straight into over and over. I have not tested this yet but am assuming they are right. Directions should not be needed. Here is a video example by
EverStoned77Original solution:
Level 10 of the tutorial is the first portal you run into. Most likely you will get this through normal progression of the game but if you replay a lot of levels you may get it sooner than later. If you flew through the game or just want the achievement then load up level 10 of the tutorial stage and do as follows:
Turn right 2, forward 4, left 1, forward 4, forward 2, right 1, forward 4, left 1, forward 2, right 1, forward 4, left 1, forward 2, right 1, forward 4, repeat underlined part.
The video is proof the original solution is way slower than the new one
It has been brought to my attention that this achievement can be buggy/glitchy and require nearly double the amount to unlock. When I wrote the walkthrough for this game I had to run each level so many times that I had it unlocked very early into the game. It should pop so just keep pushing and perhaps try shutting down the Xbox and reloading the game.