Thank you so much for all the kind words! Glad to hear you're having a good time with the game! As for double jumps, the game is kinda too late in development to add such a major change to the combat system. Would require me to draw more vertical stage backgrounds and a screen zoom to keep both characters on-screen, reprogram the enemy AI to include double jumps in their routines, etc. But you're in luck: The game DOES have universal air chains, just like on the ground. You need to press L-M-H manually, there's no auto air chains. Hope that helps!