This is an interesting idea for a story. I must say I'm hooked.

However, some small things:

"when somebody pours heart and soul into something the way I've poured mine into this universe, it's expected that I get emotional when it's threatened."

This is a parallelism problem. Also, I'm wondering, Who's heart? Who's soul? Also, the preposition, "into this universe" feels too tagged on. Bring it up later. Perhaps it could read,

"When somebody pours their heart and soul into something the way I have, you expect him to get emotional when it's threatened."

Also, you have another parallelism problem: "...devotion, and even caring and pride." "Caring" should be care. I, personally, wouldn't include the "and even" either.

One last little thing: "For the budget office to decide at the last minute not to renew funding for the coming quarter on account of the war, especially this senseless, destructive, and stupid war with no objective – well, it really steamed my gourd."

The fact that the war is stupid, destructive, and pointless doesn't exactly convey why the budget office should continue funding the protagonist's universe. You basically blew a hole through your protagonist's argument.

Some bigger things:

You start by saying the universe has ending. Then next sentence basically says, "well, not really." That's very manipulative, and your reader might not like it. I'd lose the second sentence entirely, plus the "please try to understand."

Why not depict the conversation with the budget office? Sounds like it would be a blast. You seem to go over some very interesting points way to fast.

The idea, however, is gold. Reminds me of Douglas Adams.