I really fail to see how this is relevant. The style is a bit similar to Thaddeus style in the fact they use a lot of black but they're not even remotely similar aside from that. Why would Thaddeus need credit even if the art was inspired by him (though it probably wasn't)? Are there laws against being inspired by something and not crediting them that I'm not aware?
If you fail to see the similarities (and downright plagiarism of his aesthetic style) then there isn't much I can do to convince you otherwise.
I didn't mention that Thaddeus needs to be credited; that is a faulty conclusion that you jumped to on your own.
I merely mentioned that it would be awesome if the original progenitors of an idea were the ones to profit from it before someone else comes in and takes the credit (and money) for your ideas.
The entirety of mobile games by 'King' are merely wholesale plagiarist copies of already-existing properties with slight reskins and nothing else. Often times it is a blatant copy & paste and yet nothing is done about it.
My point was that if you don't make money off of your ideas, then if someone else comes along with similar or outright plagiarist ideas ripped from you, it will be too late to do anything about it. You'd end up forfeiting your chances at entering the markets at all. The market tends to remember the most popular names even if they came later, but it is always the first ones on the scene that make the difference.
-MineCraft is a shameless clone/mod of InfiniMiner; blatantly admitted by the MineCraft creator.
-Every other crafting game with the same aesthetic as InfiniMiner/MineCraft to try to siphon off some of that money.
-World of Warcraft shamelessly wholesale rips off concepts and ideas from other games and people mistakenly attribute the original idea to Blizzard even though it was done before (transmog, flying mounts, garrisons, threat meters, and much more).
Get in and stake your claim to your own ideas before someone else does it for you.
And yeah, that game I linked blatantly ripped off the unique aesthetic that Thaddeus created in his rom hacks years beforehand.
It would be similar to someone ripping off Akira Toriyama's art style and trying to call it their own. An artist can have a unique aesthetic that is their 'trademark' of sorts.
Looks much more like Cave Story, Hero Core and N+ too.
I take it you're being facetious because otherwise you're completely wrong. Downfall looks nothing like any of those that you mentioned. It looks like an 8-bit Thaddeus-style game. The aesthetic that Thaddeus established lets you know at a glance that they had a hand in it.