readme overhaul

README.md

@@ -1,4 +1,10 @@
 # AM2RModPacker
-Mod packaging toolchain for AM2RLauncher mods.
+Mod packaging toolchain for [AM2RLauncher](https://github.com/AM2R-Community-Developers/AM2RLauncher) mods.
 
-TODO: Actually write this
+This is for modcreators who wish to make their mods usable with the [AM2RLauncher](https://github.com/AM2R-Community-Developers/AM2RLauncher).
+It currently supports creating Windows, Linux and Android mods.
+
+For actual mod creation, it is recommended to use Game Maker: Studio and the [AM2R Community Updates repository](https://github.com/AM2R-Community-Developers/AM2R-Community-Updates), but they can be created with [UndertaleModTool](https://github.com/krzys-h/UndertaleModTool) as well. 
+
+## Usage instructions
+Currently todo, as they should be self-explanatory anyways.