Gameplay patch!

Hi y'all! With this update the game should be a little more challenging, but more balanced as well:

Now both you and the enemy deal damage at the same time: you'll take the hit even if you oneshot

Upgrades will now always give you a buff, but it will be of only 1 point to a random stat
Rats are no more useles, being now a 1/2
Boars have been nerfed from 5/10 to 5/5, first boss room is now a joke
Added a spike enemy

The game is still luck and stat-check based, but is a bit more playable now.

Any feedback is as always welcome!