Thank you for your great reply. Great job I don't think there is someone made to higher than you. If I continue to develop this game I'll definitely take your advice. Powerups sound cool
Thank you for your review. I kept that in my mind while making the game anyway. The goal is to stay as long as you can. And crow count increases linearly (plus 1 or 2 every wave). I can't say I know how to set game difficulty curve but I'll definitely try to improve.