Man, the T is a pain. Hints (p.s. is there a way to hide spoilers?):
1: Keep folding the paper in half horizontally until you get a straight line
2: Line it up with the top of the T.
3: You'll have one more fold after folding the stem of the T.
Awesome game and story! I think the simplicity is perfect for it, animations and such aren't necessarily needed.
An idea for the next one: To feel more like we're actually decoding an alien language, swapping out symbols for letters instead of letters for other letters might be neat. But it was really fun as is too!