How do I create a jetpack?

So, I am making a 2D platformer shooter. I am implementing a backpack feature in the game, but do not know how to approach this. It should work alongside the normal movement system, but everything I try is horribly broken. Maybe someone could look at the capx, point me in the right the direction, eh? If you decide to do this, thanks in advance.

CAPX: https://drive.google.com/file/d/0B-jGql ... sp=sharing

Again, if you help me, thank you. I do not know if I am asking for too much here. <img src="{SMILIES_PATH}/icon_e_smile.gif" alt=":)" title="Smile">

Event 14, the else, add obj_player jetpack stop (stop jetpack)

Event 14, the else, add obj_player jetpack stop (stop jetpack)

That actually works pretty well. There's still the odd problem that if the player is moving on the ground before activating the jetpack, he won't go upwards. What's that about?

I believe its due to being stuck on the floor with the platform and trying to get off it with another plugin, easy fix is manually moving it up one time breaking free from the ground ...

I could be wrong ... but it works ^_^