Better visual difference between walls and props

[Cwpute]

Please differentiate solid structures better from props that can actually fall and react to the ball's physics. I'm colourblind and sometimes i couldn't tell right away whuch blocks i could move and which i couldn't.

A good way to do that would be to give them a texture or pattern of sorts. For example, a checkered pattern, polka dots…
Another way would be to have a different outline for these blocks.