So I'm making 2048 now. Interesting. Going to try and write it in under 100 lines.

You could use a two-dimensional array for the 2048 board instead of 4 arrays for each row. DIM (or VAR) NUM[4,4] PRINT NUM[1,0] -> 0

oooh. didn't know those were implemented here :3

It goes all the way to four dimensions, by the way!