The controls are very slippery. It is difficult to precisely land a jump. It would be nice if the lava didn't flow until you started moving. The spacebar is the jumping standard, though some games do use W. Some controls on screen would be helpful. You can use an OR operator to check for KeyCode.W or KeyCode.Spacebar to get both of them to register a jump if that's something you would consider compatible to your design. The controls were my main issue though. Keep it up, I'll follow the project and try again after some updates.