Here is the full list of all 23 MouseCraft achievements.
Design one level in the Level Editor.
Unlock Ratoid feature
Unlock Brick Bomb feature
Unlock Anima Shards feature
Spend 600 seconds under water.
Exterminate 10 Ratoids by using Exploding Bricks.
Exterminate 10 Ratoids by leading them into Acid Obstacles.
Exterminate 10 Ratoids by smashing them with Tetromino Bricks.
Exterminate 10 Ratoids by using Electric Bricks.
Exterminate 50 Ratoids.
Destroy 100 Tetromino Bricks by using Bombs.
Earn 40 golden cogs by completing 40 levels with a Perfect score.
Earn 80 golden cogs by completing all the levels with a Perfect score.
Complete all 80 levels.
Collect all Anima Shards.
Unlock Jelly Brick feature
Unlock Water Obstacle feature
Unlock Crumbling Brick feature
Unlock Exploding Brick feature
Unlock Electric Brick feature
Unlock Acid Obstacle feature
Unlock Indestructible Brick feature
Unlock Moving Brick feature