Thanks for playing! Technically you can jump off of a falling block, but it is very difficult because the blocks teleport down the grid so the amount of time the rigid body is marked as grounded is very short. I did want to fix this, but ran short of time >.<
I used stable diffusion for the menu screen and the background screen in game (not the volcano part). I also used it to generate the rock textures of the cliff wall. For the menu screen I had it generate the dinosaur, the meteor, and the background landscape. Then I modeled the 3D tetris piece in blender and rendered it at the angle I wanted, slapped it over the meteor with an overlay filter, then I passed the whole composited image back through stable diffusion to help improve some of my sloppy gimp work. Stable Diffusion is great for getting little pieces together and I have used it a lot for my recent game jam game (making screens, background, textures, ect.). I would highly recommend it as just a general art tool and I have seen some artists do some crazy things with it.