well that was strange. So, the tileset you sent was already decreased to 16 colors, all the colors were rounded to nearest multiple of 8, i had to save it as a BMP, and the tileset under the same name as a .pal, the palette converter never opened for me, so I inserted the tileset which also inserts the palette at same time to advance map, and it just slowly broke the game and all the tiles lol. But, I did get the tiles to show correctly on the block editor, it still didn't work. it was just registering as a green square. Here's a link, its a big pic.