In Dink Smallwood, you can find golden hearts, which permanently increase your life capacity. You can also find stat potions that boost one or more of your stats. Here is a list of all power-ups in the game, in roughly the order that you can find them.

Golden Hearts

1. Southwest of Martridge's cabin, in a treasure chest.
2. Go south from Matridge's cabin after you learn fireball. There are some trees to the right of some bushes that you can burn down. Burn the topmost one to get access to a new area to the right. There is a tree in the northwest corner of this area east of Martridge's hut. Burn it to find a treasure chest containing a golden heart.
3. There is a tree northeast of Goodheart Castle in a screen with a lot of ducks. Burn down the tree to find an underground room with a treasure chest surrounded with hearts. In the chest is a golden heart.
4. Northeast of Goodheart Castle, on the west side of the river, there is a tree that you can burn down to reveal a treasure chest behind it. The chest contains a golden heart.
5. Northeast of Kernsin, there is a tree that you can burn down that has a golden heart hidden behind it.
6. In a screen east of the Goblin Sanctuary, there is a treasure chest that contains a golden heart.
7. South of Windemere, there is an arrow made out of stones. Break the barrel that sits among the rocks to find a golden heart.
8. Reach Koka Isle by walking south across the water from the beach that is south of Windemere. Go to the east side of the island and fight your way north until you reach a bunch of treasure, including a golden heart.

Attack Potions

Attack potions are red.

1. In Martridge's cabin after agreeing to slay the Bonca.
2. In the northeast corner of the goblin sanctuary.
3. See above
4. See above
5. See above
6. In a screen southwest of Windemere, there is a Slayer, as well as a rack of potions and things. There is a red potion behind the rack. Approach it from above to get it.
7. Reach Koka Isle by walking south across the water from the beach that is south of Windemere. Go to the east side of the island and fight your way north until you reach a bunch of treasure, including a red potion.

Defense Potions

Defense potions are blue.

1. Go east a couple of screens from the stones that make the shape of an arrow (south of Windemere) to find a blue potion.
2. Reach Koka Isle by walking south across the water from the beach that is south of Windemere. Go to the east side of the island and fight your way north until you reach a bunch of treasure, including a blue potion.

Magic Potions

Magic potions are purple.

1. In a screen south of Terris, there are some trees that form an upside-down V. Burn one of these trees to reveal a staircase. The treasure chest down the stairs contains a purple potion.
2. Along the east coast near Terris, there is a thin strip of land that contains a purple potion.
3. North of Goodheart Castle, there is a purple potion just sitting out in the open.
4. Reach Koka Isle by walking south across the water from the beach that is south of Windemere. Go to the east side of the island and fight your way north until you reach a bunch of treasure, including a purple potion.

Megapotions

Megapotions flash many different colors. They boost all of your stats by one.

1. West and slightly south of Goodheart Castle, there is a screen with a giant pillbug that guards a treasure chest. Avoid or kill the pillbug and hit the treasure chest to get a megapotion.
2. Go east from George the Goblin's hut to find a megapotion.
3. There are two megapotions in the area with the Duck Idol. Bomb the rock in the back to gain access.
4. See above.
5. Reach Koka Isle by walking south across the water from the beach that is south of Windemere. Go to the east side of the island and fight your way north until you reach a bunch of treasure, including a megapotion.