Die Three Times or Less To Get the Last Gem in a Level

You may notice that the fifth Gem of a level is nowhere to be found in the level itself. This is the Survival Gem, and it's awarded for making it through the level with three or fewer lives on your Death Counter. Remember, the Death Counter is not affected by the 1-ups in Retro Mode!

Unlock Skins With the N. Verted Gems

If you're struggling to collect all six Gems in a level to unlock its skin, there's a cheeky way to do this about a third into the game. After beating the Trouble Brewing level at the end of Tranquility Falls, you'll unlocked N. Verted Levels. N. Verted levels come with six more Gems.

These actually count towards unlocking the Skin. In particular, collecing 80% of the Wumpa Fruit in both the normal and N. Verted versions of the level is enough to unlock the Skin, making unlocking them go from maddening to rather trivial by comparison!