Core Mechanic -> really fun concept, lots more room to explore its implications.
Game Feel -> movement was pretty smooth and clean, albeit it'd be nice to move faster or have smaller levels.
Visuals -> Functional, could be better, could be worse. Lighting may help.
Sound -> Footsteps were nice, bkg sounds would be nice as well, and maybe a couple SFX for changing dimensions.
Theme -> At the touch of a button the entire world changes! Very thematic.