The .7z thing was a mistake indeed. I was in a hurry to put out the submission, and didn't even think of the consequences of archiving with .7z.
I am actually using cinemachine though, I used the settings which my friends suggested, maybe I should reconsider :3
Oh and the hourglass mechanic goes like this: You have no health. When you take damage, a bit of sand falls from the top to the bottom instantly. If the sand fills up the bottom, you lose. When you rotate the hourglass, your character returns to the way it was when you last saved. That means that if you pick up an upgrade and rotate the hourglass, it will be lost. That is, of course, unless you go and save prior to turning the hourglass. The upgrades are the floating orbs which are either stationary in 3 places on the map, or are dropped by enemies when killed. You press E both to save and to pick up the upgrades.
Short version is: Each time you turn the hourglass, you rewind time to your previous savestate. Since you need to keep it from filling at the bottom, you must do this to survive.
And the wall of text was indeed annoying, but I couldn't design a tutorial in time :/
Sorry for the long response, felt like I needed to clear up some of the stuff in case you want to try it again, or someone gets confused as well.
That being said, thanks for trying it out and leaving feedback, it helps a lot!!! ^^