It's referring to both. The recompiler links to the Zelda project and basically tells you "if you want to haven an example how to.proceed/what to implement yourself after the recompilation finished, you can use the Zelda project as an example".
Well, usually those re-compilers or transpilers just translate the binary to some sort of intermediate language and then any backend should be able to compile it for your target system. So, in theory those handheld could be targeted. Problem with this project is that it's not just "start transpiler, load rom, click go and your port is ready". It's more like "ok, here's your game logic. Now implement the rest (or use several other projects and duct tape their libraries together to get what you want).
The first one kinda works, but I think it'd be more clear, when used without "selbst"/self, as this would be read to reference the invention instead of the inventor.
On the other hand, that then feels like "yeah, it didn't work. The invention misfired and is crap". Maybe "Erfindungserschafferzerstörer"? (Invention's creator destructor) but that sounds off, too.
There's not really a word that I can come up with that really conveys this meaning. There's a german saying "wer Andern eine Grube gräbt, fällt selbst hinein" (he, who digs a hole for others, will fall into it by itself). Then there's the humorous "Rohrkrepierer" (along the lines of "died in the barrel") which basically means something like "dead on arrival" / that went wrong and didn't work. So it'd be probably something that references one of those, which would make it work culturally?
I mean, the hosting company would be the likely target then and they'd probably lock your account and switch off the server. Depending on your nationality and that of the hoster, at least.
It's not the most detailed thing, but I just use a free account on cron-job.org to send a head request every two minutes to a few services that are reachable from the internet (either just their homepage or some ping endpoint in the API) and then used the status page functionality to have a simple second status page on a third party server.
You can do a bit more on their paid tier, but so far I didn't need that.
On the other hand, you could try if a free tier/cheap small vps on one of the many cloud providers is sufficient for an uptime Kuma installation. Just don't use the same cloud provider as all other of your services run in.
For me, I'd like to add "games that let you set your own pace and objective and let you achieve things your own way" (obviously something like Minecraft, but I also enjoyed Tears Of The Kingdom because of that)
Or, if multi-player: Be co-op, make me do some crazy shit and make me laugh (e.g. Human Fall Flat)