Years ago I inherited my wife's family's Game Gear. After a recap, and replacing the backlight, I started tracking down games to play on it. It's been great exploring a whole library of games that I skipped out on as a kid! (I was a Nintendo kid) Now I have a nice little library of carts to play on this beast of a 90's handheld.
Because it gets stupid hard real fast. Even if you somehow make out the monkey puzzle on the 2nd level, the pinpoint jump, double jump situation at the end crushes whatever excitement you have. That level is harder than the final boss.