Immediately looked to see whether the substitution language is Turing complete. Luckily, it appears not.
Seems like you could do some very quirky animation using ligatures. For example-- imagine that the ligature for "Im" tilts the "I" toward the "m". Then the ligature for "Imm" tilts the "I" further, and so on, until I type the complete word "Immediately" and the "I" has drifted down below the "y" character.
Repeat this drift for each subsequent letter typed, slowly increasing the amount of displacement for the letters in the ligatures. Then, by the time I've finished typing this comment, all the letters would end up piled up in the corner of this textarea. :)
Seems like you could do some very quirky animation using ligatures. For example-- imagine that the ligature for "Im" tilts the "I" toward the "m". Then the ligature for "Imm" tilts the "I" further, and so on, until I type the complete word "Immediately" and the "I" has drifted down below the "y" character.
Repeat this drift for each subsequent letter typed, slowly increasing the amount of displacement for the letters in the ligatures. Then, by the time I've finished typing this comment, all the letters would end up piled up in the corner of this textarea. :)