I think that the Super Power Jetpack would be much better without the large blue particles and purple light. It’s meant to be a jetpack for people that don’t want a visible jetpack, and it just seems like a bit much.
Perhaps also replacing the jetpack flight sound with the sound of you cutting through the wind (quiet, but audible) would be more fitting? I’d love this.
The jet booster sound effect just doesn’t make much sense considering the fact that you’ve got nothing actually on your back.