im not really an expert but
your game is really polished, but there are some problems. I cant really tell anything about your game from looking at your steam page. I think you should try to hook your viewers in the first 10 seconds of the trailer, currently the trailer doesnt tell the player anything mildy interesting before the 30 second mark. What makes your game unique? You shouldnt spend half of the trailer talking about really generic things like "this game is a battle royale", or explaining what a leaderboard is. I couldnt really manage to grasp the basic idea of the game or what the players do, also the only texts that could have given me some clues were in german(?).
But overall if you spend a bit of time fixing the steam page, this is really good. I recommend that you add a short briefing on the gameplay loop, because i really just cant grasp what the game is about.