The other day I came across this game where you are a snake and if you eat bananas you grow and if you eat a chili pepper you breathe fire and then go flying backward. Also you can eat a ghost and walk through walls which makes sense. Not to brag or anything - but I beat the whole game!
Then I played a game where you can switch between yourself and your upside-down mirror version - it was quite a mind-bender! And guess what - I beat it too!