Check out this hilarious animation! https://scratch.mit.edu/projects/391951717/ Use the left/right arrows or A/D keys to move, up arrow or W to jump and space to battle bowser but, you have 10 lives! (For mobile devices, tap the right side of the screen to move right, tap the left side of the screen to move left, and tap the upper half of the screen to jump/swim.) Collect mushrooms to gain health, avoid touching enemies. Collect 20 coins or a 1UP Mushroom to gain a life. Reach the goal pole to advance to the next level.
I thought to make it harder by making it so that you can battle Bowser any time you want by clicking space.