Skylyne

Skylyne is a new, clean take on the classic "skyscrapers puzzle".

The idea is simple:
- Each row and column in the grid must contain the numbers 1-4 with no repeats.
- The spaces must be filled in accordance to the rules around the outside of the board. These numbers indicate how many skyscrapers you can see.
- If a taller (higher-numbered) skyscraper is blocking a shorter (lower-numbered) skyscraper, the short one cannot be seen.

Includes 150 levels spanning six difficulties.