Understandable. I'm just of the belief that regardless the quality of a game, they should be kept alive. Especially fan games like this of a series like Gundam Wing. You could even dump the project files and all somewhere like Archive.org or etc. and pass it off to someone else to further work on it one day in the future (may take years, but you never know, someone may take up the task!).
But at the very least, I'd make sure a copy of the game still exists publicly. But that's just my opinion.
That being said, it could use some updates, for sure. But I found it enjoyable personally, just since it's a Gundam fan game c:
this game isn't worth sending to space as an archive representation of gundam - its not even worthy as toilet paper.
perhaps the actual game where the sprites were stolen from is a better representation of the same IP by its real and legal creators. seriously.
All the assets from this are stolen. you can find them on spriters-resource.com a popular sprite rip/share site.
perhaps sonichu is more your intellectual pace.