add gooey input for sim speed

src/gooey.cpp

@@ -87,9 +87,9 @@ void drawSimulationWindow(bool& running, u64 sim_time_ms, float& sim_speed)
 		ImGui::SameLine();
 		ImGui::Text("running: %s", (running > 0) ? "true" : "false");
 
-		ImGui::Text("sim time:			%.3f s",
+		ImGui::Text("sim time:			%.2f s",
 					double(double(sim_time_ms) / 1000));
-		ImGui::Text("sim speed:			%.1f x", sim_speed);
+		ImGui::InputFloat("sim speed", &sim_speed, 0.1, 4.0, "%.1f");
 	}
 }