At first, I thought I needed to pay $6k to play the games. 😆
I see these deals quite often.
I use HTML5 Canvas, CSS and vanilla JavaScript for my own games, but would not want these game's rights. It is not a game, page, code quality problem, but it is an AI problem. Selling AI game's rights will almost never work, as I can just ask AI to make it myself.
Secondly, I am aware that AI is far too overconfident when it comes to selling. For example it suggested my first goal of a $3.99 DLC should be $500. I made it $12.
I will say that the games look unique, and not like basic clones.
You have better luck with putting the games themselves on a pay what you want in the browser, and getting donations.
Tiny Cargo's link does not work.
You can also try putting them (to play, not the rights) in a bundle together for $6 or $12.