A:
They aren’t necessarily perfect, but I clearly understood every topic you brought up. You’re able to get your point across and be understood without any problems, so you’re doing great. Here are my corrections to make them sound more natural:
“Because there are so few ingredients, it is easy to make and there are various flavors of chinsuko.”
“Some examples of flavors are bitter melon, awamori, and plum.”
“Recently, chinsuko flavor has been added to many products.” (The bit about shapes and sizes is perfect, no correction there.)
“When you say “chinsuko,” you may think of a jagged shape.”
(The first part about Aragaki Chinsuko-ya is perfect, but instead of “does not make jagged one,” you’ll want to say “does not make jagged chinsuko.”)
“This store has been family-owned and handmaking chinsuko for 200 years.”
“If you’re interested, why not try making your own chinsuko?” OR “If you’re interested, why don’t you try making your own chinsuko?” (It’s a matter of personal style, and neither are incorrect!)
Hope this helps!