W	WIDTH
H	HEIGHT
D	FRAME_DELAY
X	OFFSET_X
Y	OFFSET_Y
T	TEXT_X
N	TEXT_NEXT_Y
S	initial_seed
B	Block

p	draw_text
q	grid_image
m	make_tile
w	collision

f	chain_history
u	total_tiles_cleared
e	score
a	block_index

s	seed
g	grid
c	color
o	orientation
o	pending
o	block
l	blocks
h	input_history
h	cells
$h	$input_bytes
n	updated_block
n	tmp_key
n	chain_length
z	bonus
c	key
r	clusters
t	sub_cluster
t	group
v	visited
v	remove_tiles
v	updated
v	max_chain_index
r	updated_grid
z	stack
x	normal_image
y	flash_image
x	tiles_cleared
y	group_bonus
z	clear_colors