Hi, and thanks.
I've uploaded the source code, as well as prefab assets. They should be available to download. This is my first ever Unity game, and I wasn't really expecting to share the code with anyone, so it's not very well documented, and the structure is a bit confusing in places. Hopefully it'll still be of use to you, but there's a good chance that other people's code is better structured and more efficient.
And don't worry, your English was perfectly fine.