Wow, thank you very much for your great review, I very appreciate that! I was always a huge fan of the C64 Boulder Dash and this is my fist and yet only game I've ever made so far.
Also appreciate your critics and will consider it. It's true, the game is a bit hard, and it would be nice to access some content more easily. But maybe, if the game attracts some bigger community, or I find some time, I will do another sequel of the game.
Enjoy and cheers!