Nice hand drawn graphics.
I struggle with the controls though. The screen showed press E or W to walk into a door.
However when I pressed those keys they didn't do anything.
After some head scratching, I realised the arrow keys controlled walking.
However, I could go up - eventually I tried W and that worked.
The minigames were okay - the walk up the wall one is a great idea.
You need to be careful with quizzes - the country was the Soviet Union - not Russia.
There's always some so called smarty boots around to correct you :).
Some better questions might have been to ask stuff the astronaut might be expected to know such as the value for gravity, or the speed of light.