very interesting concept, I really liked the metroidvania-like map... being able to explore adds to the depth of the game, though not much to do atm except collect coins.
the controls could use a bit of an adjustment as it feels too slippery, and isnt as precise as id like it to be. the switching of the platforms being based on in-game time also kills any momentum... I wonder if having the switch based on your jump be better.
art-wise, i think it looks really nice... having slight variations with the tiles and making some moving parts to the levels might make the game more visually interesting, as currently everything does look static.