Great concept with the switching of levels, really keeps the player thinking to remember where they were.
I enjoyed controlling the slime, it felt smooth and responsive, the only real point of critisim I have would be that it would be nice to have a way the player themselves can restart the level as the level would switch and I would know I was going to fail because it stopped above some spikes and I would have to play the other levels just to die and restart.
Love the name too!