It is a really nice game. I like the look of everything and it was fun discovering the platforms. The fading effect on the invisible platforms are good. Being able to drop something onto them is cool as well.
It is really cool having something following you that helps out. My only complaint which has nothing to do with your platforms is it feels unnecessary to have to switch between modes. In many rpg games it is simpler to do multiple things like attack, and explore and think you could take inspiration from them. The cursor could change automatically to attack when it is over a target, and perhaps if you hold the attack button down it could lock onto a target and keep shooting so you can move as well. Hope you like my idea. Am sure you have plenty more.
Great job! Best of luck.