Failing because of one thing

It's so frustrating when you fail because of one little thing lol You end up getting hooked for an hour, or two... I'm playing without spending money or watching ads, so I'm glad there's no separate stamina system. As you level up, various new rules appear. Honestly, I can't shake the feeling that it's just the icons changing due to the limitations of puzzles... (And the one I hate the most: the monkey)