I'm gonna give you a critical comment, I love the lava texture. But the jetpack feels very strange as if on the moon/ low gravity, It may have been your intention but I'm not sure. You could add an initial upward jolt to using the jetpack as if the character is jumping before the jetpack takes over, it would make for a better control feedback, and seem less floaty. It should be easy to implement since there are no difference in the platforms world Y position. Funny enough my game uses a jetpack too XD