Thanks! I really appreciate the feedback. I actually only spent like 3 or 4 delirious hours level designing near the end, and it's one of the things I wish I had spent more time working on. As far as the air control goes, I'm definitely gonna have to spend a lot more time testing out different values. By the end of the jam, I had gotten too used to spamming rockets, so I was as concerned about it as I should have been.
I'm really glad you appreciated the visual style of tutorializing. Seems like a lot of people didn't, and I'll have to be at least a little more explicit in the future. Either that, or I'll just have to be more clever with my show-don't-tell approach. :)
Thanks for the tip about JFXR. I did see that someone else used it and added it to my bookmarks, but I haven't really tinkered with it yet. I'll have to make sure I play with it before my next jam!