UM ok....welll its hard to figure out ..but things I would change considering its a spaceship are.
1- in the system every tick event --> there is no need to pin objects like the thrusters here because PIN already is an every tick function...
you should make a new event before this everytick event
System -> on start of layout ....then place all of your pin actions here not in the every tick event
also make your PIN action( position only) rather than rope style..pretty sure that will help alot
because rope style is for having something drag behind the object its pinned to..
Position only style will allow rotation of the thruster relative to the Spaceship hull and allow directional vectoring
2- it seems you are NOT really using the Physics motion for the thrusters..
YOu may of wanted this as a feature its had to tell from here ..but normally if you press w to thrust forward..
what you would do is rather than move the thusters 2 pixels instead use the physics behavior to "apply force at angle" while "w" is down. this will give you the thruster like movement that I think you are after..
also....one other way would be to ..
on "w" pressed...apply a uniform physics force to all engines...
then when you hold "q" or "e" down ->apply an extra physics force to the correct and relative thruster.. eg: q for left or e for right thruster or reversed
this way..you would still have forward motion but the additional physics force on either the left or right thruster would or should slightly turn the spaceship in the direction you want..
but yeah first off i would fix the every tick functions and make them -> on start of layout..
pin behaviour is already every tick...no point doubling up on commands for your processor if you dont need to...
youll probably find it works alot better too if you pin (position only) rather than rope style
somewhere on the tutorial page or in the example scenes in construct 2 is a test showing you how each PIN style works....im pretty sure its in the examples when you load a scene in construct 2
hope that helps