Help me solve one of these three SNES emulation problems, and I get to play FF3(6)

Hello,

I'm trying to get an SNES emulator to work in 14.04 and am having issues.

If I can solve any of these three problems, I'm good to go.

Problem 1)
ZSNES freezes every 35 minutes like clockwork. This problem seems to have existed for a long time. I see lots of forums posts in the past about it but no solutions. It's playable, but not actually enjoyable.

Problem 2)
The latest version of snes9x produces the following error when I try to run it:

./snes9x-gtk: error while loading shared libraries: libpng14.so.14: caot open shared object file: No such file or directory

I'm thinking about trying still one version of snes9x prior, but I thought I'd see if you guys could think of anything. Here I thought the upgrade to 14.04 had gone flawless, until I tried to play super nintendo

I can't use that super fancy super accurate emulator byuu wrote, my computer isn't that great.

Can anybody else offer a solution perhaps that I haven't thought of?