This is great! I think the resurgence of interest came from this video:
Which is 1 year old, but has just started appearing in feeds. There are a few issues I have noticed with the implementation, not entirely sure if they are genuine issues, but nuances which I've spotted:
1. Aces are low
2. If you play, say, a 5 on a weapon, you can play another 5 on it, the rules state that each card must be lower (i.e. 4 or below)
3. If you're on 15 health and take a 6 health card, you get zero health, I think you get +5 health and forfeit the extra 1
Great little implementation, would definitely play a better version!