Hi there!
At the moment there are no plans to follow this game.
I created it as a small proof of concept, but it never got that much interest, so it just didn't make sense to keep developing it.
That said, I changed the L block to be a bright orange color, that way it should have more contrast against the background and hopefully that would make it easier for you to play.
Thanks for the praise and for letting me know about this issue.
Please let me know if you notice any other visibility problem in this or any other of my games.
Hugs.-