This is a good game, but very buggy, and after many hours of play I encountered a game breaking bug. There is an issue that happens often when it you try to get an ad generated reward it can't load the ad. If you do this on an weapon upgrade ad reward it will make you have to restart the game. I did this once and it set my gold to 0 and I also get WAAAY less gold rewards after playing a run than I should. Like 40k gold instead of 2 million. Fix this issue and I will give this game 5 stars.