Characters are to small

I'm working on this platformer game. The screen size is 480x320 and I want it to stay that way, but I realized that all the characters I made are a little too small. I don't want to have to edit every one of them and resize everything.

 Is their a way I can zoom the camera? what would be the best fix for this?

Well, the best fix would be to resize everything.

Yeah, but there's got to be an easier solution. I thought zooming the camera 2x would fix it. Is there a way to code that?

Basically what I'm trying to do is have my game fit on a mobile device and be able to see my main character. The character is 24x36 in pixel size.  I changed the screen size to 240x160 and changed the scaling to 2x (just to see what it looks like on desktop), but now it looks like it's zoomed in too far. Do you know if 360x240 is an okay size for mobile games? or would that stretch it out weird?

for mobile games you should use the recommended 320x480 resolution. Check out my scaling video why =)
Scaling > https://youtu.be/-DFdElPs9aM

If you find that rescaling by hand takes to long, check out this quick tip that is quick in rescaling actors with allot of animations > https://youtu.be/PxUBUE8b5WY