Game's awersome and I like a lot the atmosphere you both created. However, I found a couple things that can be polited a little bit.
Here some things I noticed:
-Softlock at lvl 3. After the statue falls I have no idea how to continue because of the invisible wall that blocks the way. I don't know if I couldn't figure it out or that wall shouldn't be there.
-Jump works unconsistently. I think it might be a problem with the ground checker or the input reader.
-In the pause menu the slider that controls the bar would be nice if it saves the player preference with playerprefs. They are so easy to do. You just need a loader and a saver like this(
PlayerPrefs.SetFloat("whateverName",slider.value);
slider.value = PlayerPrefs.GetFloat("whateverName");
)
-Pause menu having just a "Return to Menu" Button is a little bit tricky in my opinion. Every time I open it I accidentally return to menu because I instintively think It's a resume button. Maybe adding a resume Button helps. Anyways test it with other people to see if this is a common thing or just happens to me.
Btw, I love how polite you got the portals. I just noticed them because I used it in the past. Good luck with the project guys