I only got to the 3rd puzzle. I think the wrong platform falling out from under you is sufficiently difficult without adding jumping. I tried about a dozen times and couldn't get further than left, left, right.
Its a great idea and it seems like you got a lot done in 10 days, based on the number of items in the respawn room. I wish I could have gotten further.
I did have trouble with the safe, I couldn't figure out how to activate it then I got a discord message and tabbed to it and when I went back into the game I heard it beep and the buttons were then working
Viewing post in Death Quest jam comments
I did get the note eventually but until I tabbed out and back in again, I couldn't put the code in, I tried pressing E on the safe, I tried typing the numbers in manually, I tried facing each number and pressing E and nothing was working.
Knowing the right order didn't help me though when I missed the jump more than 50% of the time, too far, or not enough, at least 3 times I didn't even make it on to the first platform. I was actually considering if I could just gravestone hop it all the way, I had so many graves down there I stopped dying when I fell off because I'd land on a grave but they were too low to get back up.