Bike won't start after winter

So I put together my first motorized bicycle last summer and it was working great! I put it into my storage unit for the winter and haven't ridden it since. (It's been about 4 months and up here in Idaho it does get below 0).

I tried getting the bike started today with no luck. It's about 40 degrees F today and it normally starts OK at that tempurature. I pedalled as fast and as hard as I could for about 5 minutes (I did take a couple of breaks during that time), and even tried adjusting the choke. Still, I didn't even hear a sputter.

I have a few questions:
-Is there anything that could have broken simply because it got too cold?
-Does it take more to get the engine started after not using it for awhile?
-If there's an issue with my spark plug or magneto box, how could I tell?

I really appreciate your responses! I tried searching on the site but couldn't find an exact answer to my questions. Thanks!

I was not even aware that could be an issue! Yeah, it's a 2-stroke, and there was previously mixed gas in the tank. How would you go about draining it without making a huge mess?

-Does that also mean that I probably shouldn't mix 2 gallons of gas at a time?

And yes, it was kept dry during storage. just very cold.

To eliminate all other possibilities, is there anything else that could keep it from starting?

Thanks a ton! I was able to get it started. I'm pretty sure it was the bad gas because after draining it and putting new stuff in, it started with a breeze!