Tried the new version. It's a bit annoying that it requires the Indie gala client now but whatever. There are two issues I noticed after a couple quick games.
1. For whatever reason, the rats stampede push away the other enemies instead of going through them, so if you move to avoid the rats, you might still get hurt by the enemies that are pushed towards you.
2. The weapon pool is messed up now, it only offers Molotovs as a weapon. This means Ricgian is objectively the worst character as he's then limited to a single weapon throughout the run, while for other characters the lack of extra weapons means killing enemies takes longer and there's less upgrades to pick so leveling up or getting burial urns becomes useless quite quickly (specially if you grab the Pope's head perk)
The worst impact of that change though is that you can no longer avoid getting the "upgraded" molotov that seriously SUCKS. Having pools of fire dealing continous damage is miles better than bouncing flames that only hit each enemy once or twice. If you really want an upgraded version of the molotov it should be a circle of fire around the character, that disappears after a bit like the chainsaws.
I downloaded it (with IGClient) but when I start it, it takes me to the Steam page where I have to pay for it :\
Delete the steam dlls in the game folder and it will open without requiring purchase of the steam version. They shouldn't include those dlls in the Indie Gala download.