I'm going to admit that I dedicated at least half an hour to figuring out this game and was so ashamed when on my last attempt I won in 20 seconds. If there was an option to decide when attack phase starts, then nobody would get stuck and win like I was able to. I think if enough cards are spawned you just can't win anymore and have to restart which doesn't feel great. The game can get so laggy if you let it go on for more than 20 rounds with no success. I wish I could say there was multiple strategies to win but there's only 1 and it isn't a very satisfying one. Do you want to know how I won? Immediately spam buying all towers in the 1st round and blow through your cash. Optimally you'd wanna have 2 mines, 2 factories, 1 tower, and 1 drone. The difficult part is only in that you need to buy as quickly as possible so that you don't waste a round and get extra cards. If I missed something please let me know, but I feel confident in my criticisms given how much time I played this for.