Currently, the only tile is hardcoded into Map. It should be placed in vanilla mod with implementing a draft for general mod structure.

Currently, all routines are created on app start and deleted on exit. This should be changed to creating & deleting them on actual need, e.g. create Game at pressing "Start game" and delete it when returning to main menu.

As any Lua binders are used only inside scripts managed by LuaFile, they should be moved inside this class. After that, it would be easier to implement buffers for nk_edit* bindings.

Use any simple cross-platform library for networking.
Split current Engine and Game classes into server and client parts.
For single player game - run local server.

nk_edit requires a buffer to store the string. As it's used inside Nuklear context, which is used in Lua files, it's better to keep a separate buffer set per Lua file.