There's now stats for total kills, kills with each weapon type, and revives. Along with achievements that compliment those stats!

The game already supported Controller, but was conflicting with the recent addition of menu navigation.
So I fixed up any/all controller-related issues as well as issues I saw when playing on the Steam Deck.

Since this game was made in the early days of the Scene System, it was made before there was even a proper Navmesh solution. Now that our Navmesh support is better than ever, I thought I'd finally add it.
So you no longer have to hunt the zombies down, they should come to you naturally.

There's still only 3 simple enemy types, but I've added some logic to the way they spawn and made the game get a lot tougher overtime instead of staying mostly static. I also increased the initial difficulty from what it was since the start of each game felt a bit too slow.