I've been really happy with the feedback I've gotten from y'all on my game DwarfSweeper! If you haven't got a chance to play, here's the link:
https://ldjam.com/events/ludum-dare/48/dwarfsweeper
Anyway, I've been working quite a lot on improving the game, and I think it's solid enough to make a full game out of. The first set of changes I can show are graphical improvements!

This is the new entrance to the cave, where you start your DwarfSweeper journey. I've made it so the graphics are pixel perfect, and the couple blocks beneath the entrance are unbreakable. There will be other area where the blocks can't be broken in the future!

And here's my latest attempt. Not even close to my high score, but you can see the vast improvement to the tile set, along with using smart tiles. The flags have also been changed by popular request to be on top of the block you mark, instead of sticking out. Much clearer!
I'm not totally sure what direction this game will go in the future. I want items and shops, and probably caves separated by doors instead of infinitely going down, but the overall game? Still in the ideas stage!