Separate in-game bindings from menu bindings

Also preemptive version bump

scene/key_config.lua

@@ -5,8 +5,6 @@ KeyConfigScene.title = "Key Config"
 require 'load.save'
 
 local configurable_inputs = {
-	"menu_decide",
-	"menu_back",
 	"left",
 	"right",
 	"up",
@@ -75,10 +73,15 @@ function KeyConfigScene:onInputPress(e)
 			if e.scancode == "return" then
 				-- save new input, then load next scene
 				local had_config = config.input ~= nil
-                if not config.input then config.input = {} end
-                config.input.keys = self.new_input
+                if not had_config then
+					config.input = {}
+					config.input.keys = {}
+				end
+				for k, v in pairs(self.new_input) do
+					config.input.keys[k] = v
+				end
 				saveConfig()
-				scene = had_config and InputConfigScene() or TitleScene()
+				scene = had_config and InputConfigScene() or MenuConfigScene()
 			elseif e.scancode == "delete" or e.scancode == "backspace" then
 				-- retry
 				self.input_state = 1