Not bad
I just started to use game factory 2 myself and I can say that this game is actually pretty cool. However I found several bugs:
-I can't find the back button when I read the instruction, I have to reload the page.
-I can't see all of the health bar in the flying level, half of it is outside the screen.
-In the flying level, the background doesn't take up the whole space.
-In the platforming level, I can't see my health at all times, i can only see it in full when I jump. If you kept it static in a corner it might help.
-If you fall halfway through the platforming level, the game doesn't end.
As a side note, I do agree that the space level drags on for too long, add a boss fight or more variety in enemies. If that takes up too much space increase the difficulty by making the asteroids fly faster and reduce the length of the level.
This isn't a bda game, with a bit more work it can turn out pretty good. Don't give up!