Hi, we tested your game, and here is the feedback :)
What I liked:
The concept, The multiple levels in the demo, The theme and how the menu and everything is coherent
What I would improve:
Have the two worlds compliment one another, Feedback on what happens or might happen when swapping worlds, Slight time slow effect between swapping worlds to better react, more guidance on where to go, Have completing the level be enough to unlock the next level and collecting the hidden item count towards unlocking special levels or something else
Watch the video for all of the feedback