I like it too. Just one question, why do you have the doors closing from the side and not the top? Just curious.

Looks like it works. If using for muskrat is it just ment to catch one or can more still get in with the door closed by pushing it open?

I like it.

Very ingenious and looks well made. Unfortunately I think you invented a double door live trap.

I like the idea of the door hinged on the side.

I was using a similar style of spring loaded door but hinged from the top (like normal) for marten trapping. I had a couple escape by working their nose under the door and forcing it open -two springs put a stop to that but caused other issues.
Trail cam video though showed that the marten would naturally direct their nose to the bottom of the trap when they worked over the door.
I'll bet hinged from the side would confound their efforts. I think you should experiment a little more with that style. The trap being rather asymmetrical like that sort of messes with our minds, but often those are the things that end up working best.