I really like the idea and art style of this game. I like the purity of the idea of 'the game is literally 60 seconds, you just have to survive'. The rewind mechanic fits in with the time theme, and the gong at the very end was a nice little joy. Also the art is rad, did I mention that?
You really missed a trick though - When you have free time rewind, it can make gameplay feel very disjointed and twitchy. At the end of the game, during the credits (which should also last 60 seconds) I'd think the player should get to watch them successfully beat the level from start to finish as a single successful timeline, so, they can get the full experience.
I guess the worst thing about this game though, unfortunately, is the controls. The player character just does not feel enjoyable to control - it wasn't a latency thing for me, it was just, it didn't feel right, the jumping especially, and that tarnishes an otherwise pleasing little romp through the environment. Perhaps consider giving some leeway wrt jumping when leaving a platform, perhaps some more air control, and making the top of your hit box a little more forgiving (I feel like it's too easy to headbonk into a platform above you). With a little tweak to this game here and there though, I'd encourage you to be showing this to your friends and be like 'hey check out this cool game I made' - I really think this is a solid idea that lets itself almost get away with 'jump scare' style deaths due to the rewind.