I think this is the standalone game from the original creators of auto chess (the dota2-mod). Afaik they can't use the dota-heroes, hence this.
And once the standalone is released they will stop workind on the mod and focus on their own game.
Valve meanwhile is working on their own version of auto chess, called underlords.
If you've never played dota it can be kind of confusing. Basically you have to combine certain heroes and have different heroes on the board of a certain race/class, so that you have synergizing effects. It's quite funny once you understand how it works. Though due to the random factor it makes you rage from time to time.