CandyRain/guide

Pine / パイン
Enter the top-right door. Go north-east and interact with a yellow candy in front of a green blob.

Coffee / コーヒー
(Pine/Spicy Effect is needed).

Enter the top-left door. Go up a bit and right from the door. Enter the hole on the ground. Go up and interact with the brown candy (avoid the chasers).

Sugar-Free / ノンシュガー
Enter the top-right door. Go north-east and interact with a large green blob surrounded by four pillars. Interact with the green candy between the pillars.

Star Drops / こんぺいとう
Enter the bottom-left door. Go south-eastt and interact with the three pastel (pink, blue and yellow) splotches on the ground.

Candy Apple / りんごあめ
(Star Drops effect is needed).

Enter the bottom-left door. Go north-east and find a purple tile between two blue creatures. Step on it. Equip the Star Drops effect and go north-east. Interact with the green candy apple.

Lollipop / ロリポップ
Enter the top-left door. Go south-east and find a small red creature holding a lollipop. Interact with the lollipop.

Mint / ミント
Enter the bottom-right door. Go north-west and find/interact with the blue candy.

Chitose Ame / ちとせあめ
(Lollipop Effect is needed).

Enter the bottom-right door. Go north-west and find the small brown door. Equip the Lollipop effect and enter the door. Go south-west and interact with the NPC.

Sticky-Pop / ぼうつき
Enter the bottom-left door. Go left and up from the door. Find a fenced-like area and enter the little entrance in it. Go up and enter the maze. Let yourself get caught by the chaser. From where you're teleported to, just go up then follow the path to the left then up again. Interact with the lollipop on the ground.

Old Effects
These effects are exclusive to older versions of the game.

Spicy / げきから
(Available in versions up to ver. 3+5.)

Enter the upper right door. Find a red square and step on it. In the next area, find a red candy and interact with it.

Milk / ミルク
(Available in ver. 3+4 only.)

Enter the bottom-right door. Find a white candy on the ground and interact with it.

Poison / どく
(It's the same as the Candy Apple / りんごあめ effect.)

Hallway Attack
Enter the bottom-right door. Go north-west and enter a large brown door. You will now be in a long hallway and unable to equip effects. Walking down will have you face a red-eyed white creature who will attack you and lower your speed. Trying to go back through the door will cause another one to charge, making the screen fade to black and forcing you awake.