Thanks! Sure, here are my two cents :) After several tries to understand the mechanics, I reached the conclusion that repairing the most damaged door while waiting for reloading and then using the bullets on the enemies which are forcing the current most damaged door was an effective strategy. Also, I placed the towers close to the doors which I plan to repair last. By the way, relatively weak “towers” is a good design choice to avoid the age-old pitfall of decreasing difficulty curve (which can eventually take away the challenge) through the gameplay. For the mini card game, it is a cool touch in the wild west concept but I've never understood any game involving cards, so i am not the most reliable player to evaluate that :D