I really appreciate this feedback, as it is my first one too, lol.
I tried to make it less "boring" by increasing the speed of the birds every time you kill one. I thought about adding some powers and even some different enemies and a boss battle, but it would have been too much for me to meet the deadline.
I had some problems with the resolution on my wife's notebook too, but I don't even know how to begin to fix that, lmao.
Thank you so much for such detailed feedback. It made my day!