README: add ideas to do

README.md

@@ -9,3 +9,14 @@ You need the godot game engine.
 # How to use
 
 Run `godot` in the `src/` directory.
+
+# Todo
+
+- better tiles
+- more decoration tiles
+- a throwing weapon?
+- a lamp to see better where you are heading to
+- a bigger dungeon to explore
+- a random spawning location for the player
+- random spawning locations for the relics
+- a "end game", when you get all the relics, a new area would be accessible somewhere with a kobold boss (green K)