New version released! Go get it in the
first post! And note that patches are welcome again

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Changelog:
- You can now play generated puzzles of multiple difficulties
- The squares now scale with your display resolution
- The game congratulates you when you solve the puzzle correctly
- The game saves your progress when you quit
- BUG FIXED: Touching the screen left or right of the playfield triggers unexpected cell changes
@sergeyvl12: did you manage to test the program? Did it run on the Touch?