Devs need to fix survivor AI during PVE. It's annoying that survivors rush through zombies even though they no longer can get through just because they don't stop to shoot.
You should change how we can buy potions. 5 coins for one potion is kinda pricey. Sometimes, the game lags and I accidentally purchase potions. Maybe if you could separate the use and buy buttons, that would be great. Good game,
though.