AFAIK no, I have been playing a couple of games in Co-op with friends and have no problems related with Windows for now, my only mistake was not measure performance before enabling everything.
Google responded, they say the refund doesn't justify more that 48 hours after the purchase, so they'll just keep my money. The idea was to donate the money directly to Darken, didn't wanted to let Google take it's commission. But I think I'll buy him a coffee anyway, I'm using the app since at least 2015, that's the least I can do after all.
