itch.io

1. No, you dont need to use every block.

2. Yes, every block needs to be connected.

3. You dont need to press any button. If you have everything right then it automatically switches to the next level.

4. The connection always take the shortest path from the first block to the second block. 

Unfortunately, its not possible to export the game to a browser version with monogame(the framework the game is written in).

Thank you for your feedback! I uploaded a new version, that dont have this effect anymore. Beside that i made some other little improvements to the game. 

Thank you for your comment. I added a new screenshot that shows how the first level can work.