Sorry for the delays so far! The slowdown issue is one that I was looking into right before my dog got sick(she's... gone now, and we miss her so much.), and it should be fixable. We had the bad luck of our AC breaking down at the wrong time as well, so I really can't use my main PC yet as it's sort of a heat monster, but I'll start work on my laptop as soon as I can on getting all the bugs fixed.
Essentially, the slowdown problem comes down to the battle system's states, which are supposed to wear off after a certain period of time. When the battle system is preemptively disabled (mostly only due to death, as far as I can tell) then the state is disabled, but the speed is never properly reset.
It's a tricky one to debug, because I thought it would remove itself naturally if I changed the order of death processing, but that seemed to have failed and my tests didn't catch it. I'll have it fixed as soon as I can.
It should be fixable by just adjusting the character's speed values though, so worst-case scenario if I can't auto-fix it via the updater running I'll have a speed adjustment set up in the debug tool so you could fix it yourself (or even speed yourself up if you're feeling cheaty!)
There is a little bit after the cats (It's a wave-style boss, take out the males first as they're the ones tied to the spawning), but not much implemented yet, just a few levels with some werewolves.