this game was so hard for me until I read some comments talking about stacking thrusters and now I can reach the end very quickly and easily
don't know about the packages tho, I guess this is what happened irl too.. is this based on a true story?
The packages add a small amount of friction and panic as you scramble to find the parts you need, it fits with the theme.
It's easier if you open a bunch of crates before you start building.
IRL I don't think anyone built a rocket from exploded parts but there have been plenty of times where new rockets were made from spares and reused parts.