Install this free DLC to get some achievements in the end.

https://steamproxy.com/steamstore/app/1218040/Yokais_Secret__Free_18_Content/
In the saga to recover the colors of history, there are 14 levels, each with 5 stages. It is an achievement called Meet for completing the first stage of each level, one for completing all 5 levels of each called Secret and another called Heart for completing all under the predetermined time, highlighted in yellow next to the gold star. You also get an achievement for completing all the 70 stages under the predetermined time. To complete the stages, you need to place the blocks with the colors following a gradient. Blocks will spark when placed correctly.

Before completing all the levels, you can get some achievements:

• Press S while in a level, then click on the cat at the bottom right corner.
  
  
  Neko's Magic

  Press 's' to summon Neko
  
  
• Click on the speech bubble next to the cat in world map (bottom right corner) to receive a hint. Then, start a level and use that hint by clicking on the magnifier.
  
  
  Neko's Hint

  Get one hint from Neko, then use it in game

After completing all levels:

• Click on the cat in world map to access a secret scene.
  
  
  Yokai's Secret

  Yokai's Secret

• Access the "book" from main menu and then click on any girl.
  
  
  The Friends

  Open the friend book(please install free DLC)

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