A Tool - Get the Broom. To access it, from the entrance to the Street, go U R R R and open the chest.

Change - Get the Windmill card. To access it, from the Nexus waypoint in the windmill, go N until you reach the top of the windmill itself and activate it. Climb down to the surface and open the chest.

A Meeting - Defeat Briar. To access the battle, from the Nexus waypoint in GO, go N until you reach the top and fight him. You must clear HAPPY and BLUE before he is available.

100% the Game With 37 Cards - Get every Health Cicada, main-game card, and broom extension in the game.

100% the Game Under 3 Hours - Fulfill the above requirements in under 3 hours. It's not too tough if you use a walkthrough.

Lots of Cards - Get 48 of the 49 available cards in the game. This is only accessible after beating the game, with the full capability of the Swap.