I got a runtime error: line 191 tab 1. "Attempt to index a nil value". "if (#q > 0 and q[1].type == "seed" and l[x][y].s == 14) then". Just looking at that line, I would guess the "l[x][y].s" is the problem and the the grid stored in "l" doesn't have a space at the x and y it ended up with (possibly because of something going out of the area it was intended for).
That said, your game page description is very misleading, and your cover art doesn't help. It took me a while to figure out what anything on the screen was or what I was supposed to be doing.