I think this is a really good game, but seriously the difficulty change on round 45 is just ridiculous, and I've heard that there is a even stronger boss at lvl75. when you have the normal level boss that requires people to make guides that flood the comment section, I don't even want to know how strong the harder boss is. honestly it really is fun game, and although its been done before, you have mad a few twists such as the labs that really add something to this game.
wish it would improve your spelling too! just kidding.