which markets are you targeting first?
We are most likely going to start targeting the German speaking countries (as these are areas we know very well) + the UK (because of its gaming tradition) + Scandinavia (where regulations allow it). Then we will expand from there.
I think that it would much popular in such countries like Russia, Georgia and etc...
I would not say so, this type of game is popular everywhere, regardless of geolocation and the country ... It's not just that it's the most profitable industry.

Yes, but everything will depend on optimization, serious work awaits the developers
