Agree - there's nothing that stops you from asking for more. Even if you don't get it now, it sends a signal that you will expect more $ later.
But, if you are really satisfied with $30ph (if you don't have a better offer to fall back on), you probably won't get (much) more. Your weak negotiating position will inevitably shine through.
I didn't downvote you, but I want to clarify what's going on because I know it sucks to get down voted with explanation.
The reason you're getting so many down votes is because you made strong claims in a harsh tone that turned out to be false in a trivially verifiable manner. The intent there is that you should've verified your claim through and through before attributing a misdeed to someone who simply sought to share something they thought was cool to make with others.
I find it important to identify that yes, a license is required to use someone else’s code - I mean this legally, not morally: you can be sued.
The sibling points about trademark law (which is different) and remix culture (which has some legal protection but not that I’m aware for lines of code) seem to miss this point.
This is a licensed use, it turns out, which is great. If the author here had not identified that before publishing, then they were putting themselves at legal risk.
[on a technicality, the MIT license hasn’t been properly invoked, since the MIT license requires the text of the license to be included in full, but the original author’s consent for use seems now to be clear]
Legally though, just because one person's proprietary work relies upon another person's proprietary work, doesn't mean it suddenly becomes open source or public domain.
Honestly I’m not surprised. The prior work could be argued as being fair use of the Tetris copyright. It certainly isn’t stealing any market from any official licensed Tetris products or services. Morally, I can find it very easily defensible.
This “Lovetris” work is a blatant copying and republishing of someone else’s proprietary work effort with no permission. Morally, I don’t see this as an egregious abuse, but I can see why this community would object to someone not acting in the spirit of open source licensing.
> But, in all systems of law that I’m aware of, you can’t make enforceable contracts with children.
In most (all, I think) US, contracts with children are generally legally valid, but voidable by the child. This means the child (or the child’s guardian) mau cancel the contract before performing any obligation. It does not mean that once completed, the exchange can be retrowctively invalidated, though.
But, if you are really satisfied with $30ph (if you don't have a better offer to fall back on), you probably won't get (much) more. Your weak negotiating position will inevitably shine through.