The concept of repeating all the levels when loosing is interesting in this game, I love how the levels gets mixed, past and present, as in time itself is broken.
i like how the lava particles add so much life to the scene.
As for the mechanics, i was stuck in lvl3 for so long till i tried to experiment with a wall jump, and it worked hhhhh i think you should mention that mechanic it in the game.
The pause menu doesnt stop the game nor the time counter.
I think the jump and controls in general are a bit floaty and heavy, maybe that's by design, but its not really my cup of tea. I respect the effort though ! good job.