Space Frontier Online is a funny reaction game in which you must build a rocket and send it flying to the planet Mars. Tap at the right moment to discard the bottom segments of the rocket before they burn up and make the whole spacecraft explode. Cast off everything but the astronaut's landing pod. Once you reach Mars, you will have to send more astronauts up there to build a space station. With 100 astronauts, you can start launching rockets from Mars and move on to the next planet. Customize your rockets and add extra astronauts to the crew, but make sure the spacecraft doesn't get blown up! Hitting the green line will give the biggest speed boost, but it is also the riskiest. Wait any longer and your launch will turn into a disaster!