Optimize textures more aggressively.
Use optipng with default options. This converted a number of textures from RGB to indexed colors, but reduces file sizes substantially.
Before Width: | Height: | Size: 966 B After Width: | Height: | Size: 700 B |
Before Width: | Height: | Size: 947 B After Width: | Height: | Size: 683 B |
Before Width: | Height: | Size: 683 B After Width: | Height: | Size: 531 B |
Before Width: | Height: | Size: 682 B After Width: | Height: | Size: 529 B |