We have updated the game to Version 1.6.1 to add health bars to boss fights, and a fixed health system! Available now! 

More Info here: https://gamejolt.com/p/we-hope-you-enjoy-our-latest-update-patch-watch-the-video...

Changes made:

• Better save feature (to help save the difficulty settings)
• Falling into pits gives you full health to help make the experience better
• The health carries over each sections of levels with all 3 characters (every time a different character appears it will set to full health).
• Difficulty set to "Simple" by default!