I really like the way this game plays. You got a really interesting concept being implemented here. Plus, I really like the slow motion effect.
Sadly though, the style of the game is not very good. It's sort of a mess. Most of the sprites look like they were made with MS paint, while some others (like the key for example) look more... 8 bit. And due to that, even the great music track does not fit in the game. It's chiptune. And for it to fit in the game, all the sprites had to be pixelated.
Seriously, I highly suggest you to turn this into a fully fledged 8 bit/16 bit game of some kind.