Yes, the fact that you can't move platforms when they are near characters is a feature. Its intended to stop the red character from jumping on a platform then having the blue character move it to the end of the level along with red. However, it still needs much more thought put into how it works to prevent shotgunning red to the end of the level with a platform, for example. I didn't have enough time during the jam to think about it too much.
Thanks for the feedback, and I'll definitely consider developing this game further once the voting has ended! It has been an absolute blast making the game.