A really fun game with a great sense of progression until a brick wall comes out of nowhere stopping all forward progress. The game is challenging but manageable up until this point. This forces players to either grind a lot or pay up to roll for better characters. For a hard stage before this, it would be a very minor grind to overcome it. Past the brick wall, every level takes hours to grind for. Everything up until this point is phenomenal however with great pacing and decent gameplay. The gacha isn't too egregious either.