Option to restart level + additional tutorial level

I have just uploaded a new build for the game, which features something that many of you asked for - an option to restart the level or remove just the hint marks from the board. Previously this exclusive feature was only available via keyboard shortcut for PC players, because I forgot to make it into a visible on screen button. 😅

And I have also added one small level at the beginning that hopefully better explains the nonogram rules of having multiple numbers in single row/column - if you're an avid puzzle solver you are not missing much, but it should hopefully help those who are not familiar with nonograms.

Thanks for playing my game!

- Mateusz