I haven't got to the killing part, but Im getting to it. I am still at the part where the "competition" begins. Im a noob at webcomics, so please tell me if it is good or bad. Thanks!
Hard to say much about the comic with just four pages up. I am somewhat concerned that at the moment it looks like it could just turn into a 'Battle Royale' ripoff. I hope you have some original ideas or something to make it original.
From an artistic perspective, you're not really using the comic format to it's fullest. At the moment the pages are tiny and frequently have only one or two panels, making it like reading a comic that goes a single panel to a single page, making it all seem a bit slow and not very dramatic. A webcomic page can be up to 700 pixels wide and as tall as you like, so you could get a lot more going on per page and make a bigger impact with bigger pages, plus you'd have room for more background and detail, because at the moment, it's all a bit sparse looking.
Basically I think the main thing you need to do is slow down. Don't rush so much, spend more time on your pages to make them more interesting looking and draw the reader in.