Hi, really enjoyed your game, very hard but fun. I would make the hitboxes on the spikes a little bit more forgiving. Also some checkpoints would've helped, as dying on the same spot multiple times having to climb again just to retry it can be very frustrating. Apart from that I loved the style and the hard challenge the game had to offer. The main concept/mechanic of the time slowing is really unique in my opinion.
Keep it up and good luck with that! <333