To open the blue levels, you need to earn enough stars on that row; if the blue level requires 8 stars, the four levels before it must have a total of 8 stars for the blue level to unlock.
Articles in this section
- What are the objectives of the game?
- Are there any guides to playing the game?
- What do the different power-ups do?
- What do the different gadgets do?
- How do I use my gadgets once I’m ready to roll?
- How do I start building my machine?
- How does the star / scoring system work when completing the objectives in a level?
- Why are there desserts in the levels? What are they for?
- Why doesn’t the level fail?
- How do I open the Sandbox Levels?