Multiple problems going on here. The planet is spinning at the end because you are trying to launch but you don't have anymore landers left.
You can't land on venus because your lander is not equipped to land on that planet. Notice the hazards at the bottom right of your screen. You have zero protection on your lander early in the game and the red which is fire is max damage which would kill you instantly.
Also when you land you need to land in the green box. Nothing wrong with the game. 
