Is this open-source? (I mean if you figured out how to do what dragonsweeper did on your own that's very neat, but still not original, and I want to learn this too)
DragonSweeper is not open source, unfortunately!
I started this project by simply replicating the base game logic of DragonSweeper, but I've definitely iterated on a lot of the concepts and added my own spin to the core gameplay. At this point I believe it's diverged quite a lot to be its own thing :)