Fragile is a theme for:

30% - hardcore delivery simulators, when you break cargo with any non-precise moves and restart. Meh.

30% - arcade/platformers with 1-life main character/1-life item in hands. Meh.

20% - drama about broken hearts. So so deep, so so philosophical. Meh.

15% - total destruction. May be actually fun, depends on implementation.

5% - interesting and innovative games.

Fragile is a terrible theme. Think about games you are going to play for weeks.