The quality of finish on this game is insane. The art style and gameplay is all on point. I got up to round 25 at which point I had all the upgrades. I did however learn about a bug at this point that the boss healed randomly sometimes. So I clicked around and found that if you click on the health bar of the enemy you can change it causing you to instantly kill the enemy so I am now on wave 50. Other then that bug this game is excellent.