tile 00 is a breakable block
tile 01 and 02 are the animation frames, and cannot be used
tile 03 is a lava tile
tile 04 is a lava submerged rock tile
tiles 05-38 are the gunship
tile 39 is a rock tile
tiles 3a-3b are sand tiles
tile 3c is a background tile
tile 3d is…another gunship tile
tile 3e is another background tile
tile 3f is another lava tile
tiles 40-4f are background tiles
tiles 50-5e are surface tiles
tile 5f is another rock tile
tile 60 is a quarter rock tile, upper left
tile 61 is a quarter rock tile, upper right
tile 62 is a quarter rock tile, lower left
tile 63 is a quarter rock tile, lower right
tile 64 is tile 60 with a different BG
tile 65 is tile 61 with a different BG
tile 66 is tile 62 with a different BG
tile 67 is tile 63 with a different BG
tiles 68-78 are BG tiles
tiles 79-7d are crystalized X-parasites
tile 7f is empty air
tiles 80-ff seem corrupted or empty, because they are just glitched out breakable blocks and/or air.