📝 adding documentation

README.md

@@ -2,11 +2,36 @@
 
 > Playing with bevy and testing stuff, do not expect code to be clean and reusable, etc
 
+## What's the target
+
+I want to try every part of building a game with bevy, without having a clear goal for the game in mind.
+What I want to try/have, for possible future game are:
+
+- [x] Good enough camera (see [bevy-cameraman](https://github.com/fabienjuif/bevy_cameraman))
+- [x] Physics / collisions
+- [ ] Good player controll / kinematic
+- [ ] Particles
+- [ ] Eventually some network
+- [x] Seeded RNG
+- [ ] Basic UI
+- [ ] Menus
+- [ ] Being able to work on divers system
+  - [ ] GNU/Linux
+  - [ ] MacOS (ARM)
+  - [ ] Windows
+  - [ ] Wasm
+  - [ ] Android
+  - [ ] iOS
+
+After this is done, the project can be considered done, and it could be seen as an example bank.
+
+## Notes
+
 https://bevy-cheatbook.github.io/input/gamepad.html
 
 windows from linux: https://bevy-cheatbook.github.io/setup/cross/linux-windows.html#microsoft-windows-sdks
 
-## Cross build
+### Cross build
 
 ⚠️ Does not work from linux to M1 because of a error regarding the compilation of `objc_exception` ([github issue](https://github.com/SSheldon/rust-objc-exception/issues/13))