For the jetpack, you could maybe show the keys you need to press in the background or some extra text for people who (accidentally) skipped the dialog before they had a chance to read it.
I also get that time was an issue, I also just have a solid color as a door in my game (it's a feature now) and that is, to me atleast, a very fun part of game jams. The game can't be perfect in only 10 days and with your game, there at least was a texture.
But could you maybe tell me what I actually have to do with the jetpack, I am kinda curious now XD