Very cool!
Of course, because it is a jam game, it still lacks a lot of polish, but I liked the approach of changing the controls, and learning it fast before the lava rises.
If I have some suggestions: Make a small tutorial room, so that the player can adapt; Avoid some key combinations like "Ctrl + Escape", which opens the start menu. lol
But overall, I liked it, and it has potential! Perhaps zooming out is a good idea too, or placing a kind of bar that shows the height of the player and the height of the lava. Any feedbacks to the players are important and very welcome!