doc updates

plan.md

@@ -2,17 +2,18 @@
 
 | Item | Description | Achieve time |
 | :--- | :---------- | :----------- |
-| Changeable map size | Map size becomes a changeable gamerule. | Before 2021 |
-| Keyboard Event | Although mouse interaction support is a feature, most process can't be done with keyboard only. What's more, a console isn't designed to receive mouse event. The goal is to make all process possible to be done using only keyboard. | ? |
+| Non-blocking recieve event | The current Winsock IO mode blocks the program when recieving messages, during which time players cannot perform operations like marking on the map. | ?* |
+| Keyboard Event | Although mouse interaction support is a feature, most process can't be done with keyboard only. What's more, a console isn't designed to receive mouse event. The goal is to make all process possible to be done using only keyboard. | ?* |
 
 New idea? Raise an issue!
 
 ## Achieved
 
 | Item | Description | Version |
 | :--- | :---------- | :------ |
-| Multi-language Support | All texts as part of UI should be moved out of source code. Program reads language file on initiation. | 2.1 |
+| Changeable map size | Map size became a gamerule option. | 2.2 |
+| Multi-language Support | All texts as part of UI moved out of source code. Program reads language file on initiation. | 2.1 |
 
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-As I'm currently a high school student, I don't always have access to computer, so issues may not be handled in time.
+*As I'm currently a high school student, I don't always have access to computer, so issues may not be handled in time.