Sputnik 19 was a Venera-type spacecraft intended to make a landing on Venus. The SL-6/A-2-e launcher put the spacecraft into Earth orbit, but the escape stage failed and the probe remained in geocentric orbit[?] for three days until the orbit decayed on August 28 and it re-entered Earth's atmosphere.
... and speed of movement (it's a 3-speed stick). Gameplay is very challenging and rewarding, and once the player has gotten through a level there are bonuses to collect, ...