Ah ok. Well, the part in Marbelava where the falling square platforms supposedly have to stack in order to create a way up, never stacked for me on the 3 times I played it. On my first try, I just kept jumping to see if more blocks would fall, yet they eventually stopped so I had to kill myself in the lava. Then I found that just running and jumping diagonally into the falling blocks will move you up too.

JJ1 and logic, they don't go well together.

Anyway, my third play got me to Labyrinthion Act 2. The water level puzzle in Act 1 was pretty clever, it took 2 of my lives too!