So my few coments about this game:
1) you should distribute .zip instead of instalation package (if GM2 allow that)
2) i like your graphic, good job done
3) whole game is really confusing, you should focus on improving this so more player can explore your game. You should tell player what to do and is goal. Map is good start but make it open somwhere around "WSAD" so you can open it when you fly and check if you are heading right way
4) i had problems with camera, it's hard to fight where you need precise controll but camera is "randomly" changing. Make camera more "static" in slow speed and then you can move it when player gain speed
5) faster travel, you should implement some "boost" to travel between planet, it's booring to wait until you fly that distance
6) i'm not sure about reloading, first i think that lower ammo you have, faster you reload, but then i realized that i reload faster if i'm moving and slower when i'm statit, that is really wierd
7) also i had problem when two interactible entities was near each other and i could "highlit" only one until i move in some precise spot
But beside this you game look nice on first look, i only managed to play it around 5 minut, then i was demotivated to play more because i didn't know "what to do and why"