This is great!!
Since it's already close to a Kirby clone, might as well make few adjustments to what you have, here are some suggestions:
1. Complete invincibility during the Tornado/Burning attacks.
Might seem cheap, but you are a force of nature for a good 3 seconds.
2. The camera is a little too close to Globby, (if you can) try backing it up a bit during level exploration and during boss battles, the camera should stay still, allow the player to see the entire "arena" and (unless they have an attack of kind that let's them do this) the boss should always be seen on screen.
3. Keeping your ability between stages (Just for those who don't enjoy switching or seaching for new abilities)
That's it for the suggestions, loved the game and especially enjoyed the ninja and grenade abilities.