This is a simple Magic Tower game implementation (not a complete project yet), the game modules are drawn with CustomPainter and can be customized to share levels. Dart is not very familiar, many of the writing is not in place ~~
There were some glitches in the development process. The rxDart used in the notification was recalled as a whole, the overall drawing was reduced, and each small module was brushed in a single swipe. Ios and Android shared and file browsing were universal.
