Nice job on the bike, it looks pretty good!
It is nice to see people that take the time to make their build their own.
If you want some winter work ideas I have a couple for you.
1. If you haven't already done so, replace the bearings in your Huffy back wheel, they tend to fail in short order.
2. Redo your front mount with a Muffler Clamp as the attachment point to the frame.
This gives you a 360 degree grip on the down tube AND a flat plate with bolts to secure the plate you attached to the engine.
That is a SickBikeParts.com front mount but you can make your own plate, the trick is getting the exact muffler clamp to fit your tube.
One of problems I see all the time with OP's builds is a poor front mount.
The rule of thumb is simple...
Grab your top bar with one hand, your engine head with the other, and try AS HARD AS YOU CAN to make the engine move side to side, if it does EVEN A LITTLE that is a fail because your engine has a lot more strength than do you and doesn't want to stay there ;-}
3. Invest in a pair of cable cutters.
Most every cable on your MB can be sized but the throttle cable and perhaps and internal shift cable as they have a nipple on each end.
Everything else is bare cable on one end so you can size them.
What you are sizing is the outside sheath, the part that makes a pull cable possible.
I start at the handlebars and get every cable to play nice and look when it hits the frame and adjust from there.
That's is a bit extreme, on a beach cruiser like yours you just compromise with some cable out front, but still 'orderly' as it where.
That 7-speed 2-stroke shifter has 6 cables and 2 wires coming off the handlebars but still possible to make it look simple with some cable cutters.
That should give you something to play with when you are snowbound to make it even nicer hehe ;-}