Really enjoyable! My head pretty much died at the final level and I gave up, but that means its great puzzle design!
A very simple take on the dimension theme. I think it would benefit more as a puzzle game if you gave the ability to look between each layer at any time.
I also hoped it would be better to see the entire map rather than just panning, as information is quite important for a puzzle game. However, I also find myself quite enjoying the exploration a bit.
My biggest nitpick would be the easier puzzle design in level 1-4 where each because of how the game is designed, each move would only result in 1-2 moves at any time and makes for relatively linear puzzles based on how the spikes were placed.
Nevertheless, I think this is a great first game! Very well put together.