Hey! Thanks a lot for playing :) ....when I was making the game, I was focusing on what my son would love and he likes repetitive behavior, so I increased the health of the enemies so that it takes more hits to kill them ....and he loved it ...btw he has reached the final level now
Ya, if you die in a level you need to start all over again. That's why I have kept all the levels open, so that player can jump into any level they want. Also, the difficulty in each level is almost same...i felt the 5th one FIRE was the toughest one.
...and best of luck for your future 3D game ...Godot is awesome!