Implement a "Game is Outdated" message

[aflacc]

Please check for duplicates or similar issues before creating this issue.

What is your suggestion, and why should it be implemented?

It would be nice if the game had a way of letting the user know that theres a newer version of the game available, and prompting them to download the newer version, I guess think kind of like how Psych Engine will have a message on startup if theres a new version I guess? The way the itchio page has versions labeled is different from in-game, so it isn't exactly super clear if you're using the latest version

[ninjamuffin99]

There is code in there we used to have! Shouldn't be too hard to re-implement it! Then it's a matter of us updating it via the NG api. We could also potentially update and keep track of versioning via itch or github...