I like those blue and orange textures, but others are a bit too plain-colored.
I suggest the following colors as main (background) colors of textures (pick nicer ones):
[] #D53C04 - 'fire' red
[] #B0D504 - 'lime' green
[] #04A1D5 - 'tech' blue, might be similar to current color
[] #8833BE - purple
[] #AE5273 - pink
[] #D5B004 \ #FFD105 - bright yellow
[] #68739B - dark blue
[] #718E7A - dark green
[] #9C6867 - dark red
[] #525252 - dark gray
[] #A2A2A2 - light gray

... I wonder, is it possible to turn off texture interpolation for level blocks in-game?