Oooh, alright. Yeah, I never saw the walljumping mechanic. Could have been the lack of feedback, but sure, now I guess I needn't have waited for the enemies. The jetpack I did use, if only a few times, but since I didn't know about the wall jump, I might have judged this aspect a bit innacurately. Also, yeah, doing new things you have no experience with is big trouble, but I think learning new stuff is part of the Game Jam spirit, so kudos for trying something different.
Thanks for taking time to respond!