Some UI changes

src/Space.cpp

@@ -264,11 +264,17 @@ namespace ZL
 		explosionEmitter.setEmissionPoints(std::vector<Vector3f>());
 		Environment::shipState.position = Vector3f{ 0, 0, 45000.f };
 		Environment::shipState.velocity = 0.0f;
+		Environment::shipState.selectedVelocity = 0;
 		Environment::shipState.rotation = Eigen::Matrix3f::Identity();
 		Environment::inverseShipMatrix = Eigen::Matrix3f::Identity();
 		Environment::zoom = DEFAULT_ZOOM;
 		Environment::tapDownHold = false;
 		playerScore = 0;
+		if (menuManager.uiManager.findButton("minusButton"))
+		{
+			menuManager.uiManager.findButton("minusButton")->state = ButtonState::Disabled;
+		}
+
 	}
 
 	void Space::setup() {
@@ -1669,6 +1675,7 @@ namespace ZL
 
 				shipAlive = false;
 				gameOver = true;
+				Environment::shipState.selectedVelocity = 0;
 				Environment::shipState.velocity = 0.0f;
 				showExplosion = true;