But to someone not paying close enough attention, it's easy to think original-Redactl is the author's game. Then that line can be misread as supporting the copycat over the author, which would be unkind in context. I misread it that way, until I scrolled back to check which one was the author's game.
So, for the avoidance of doubt:
The original original was redactle.com. The creator of that seems to have abandoned it not long after its creation, and to have taken no further interest in it.
The thing we are talking about is redactle-unlimited.com. This was made by berjin. It gives suitable credit to redactle.com. It provides a notably better playing experience than original redactle.com does. I do not consider it a copycat in any culpable sense.
And then there are the copycats of Redactle Unlimited, most notably redactleunlimited.com. That one, so far as I can tell, has simply taken berjin's code and filed off the serial numbers. It offers no improvement over redactle-unlimited.com. It does not give credit to any of its predecessors. It is definitely a copycat in every sense.
(Top hypotheses: 1. too much thread drift; 2. suspicion that I'm some sort of a shill for Redactle Unlimited; 3. actually it wasn't meant to be a downvote at all and it's just because the up/down arrows are easy to misclick on mobile devices. For what it's worth, it doesn't feel to me like an unreasonable amount of thread drift, I have no connection to RU other than enjoying playing it, and I entirely agree that the arrows are fiddly on mobile.)