Refactor to use better interfaces and event callbacks.

gamedata/gameinputs.go

@@ -0,0 +1,12 @@
+package gamedata
+
+type GameInputs struct {
+	XAxis     float64
+	YAxis     float64
+	ShotAngle float64
+	Shot      bool
+	Start     bool
+	Charge    bool
+	Quit      bool
+	Reset     bool
+}