Hi MounirDev, Thanks for the review!
1. I was unable to fix the resolution issue. I'll do more research on this next time.
2. I'll definitely make it easier as everyone's saying that it's too difficult to play. But you know before uploading it, I was think that it's too easy. I think the reason is that I played it a thousand times during development. I even decreased the health to 300, before it was 500.
Anyway, thanks for the review. I appreciate it.