Thanks for the feedbak,
- you can start a Beginner game, Intermediate and Expert (3 difficulity levels) ... that is, so you can choose fewer tiles or many tiles.
This is planned, board size and colors would increase with the difficulty.
- when you remove a tile then no new tile should appear, goal should be to remove all the tiles
To do this, I would have to generate boards that can be solved. (Currently it's only random generation).
- there should be no time limit, rather make the time count from 0 ... so the challenge would be to finish it in as shortest time. I like to take my time to solve puzzles...annoying that I have to start all over again because of a predefined time limit.
As avobe is necesary to change the goal to change the restriction.
- Closing window not possible (ESC works though)
Less bytes than a windowListener.