Nice game, I think this have potential. It was a unique experience, and lots of fun. I think, if you want to enhance this game, you should focus on making the minesweeper part of the game more fair. It is hard to make this, but it is possible. There was ton of situations that I needed to take a guess and be lucky to not hit a mine. I also think the upgrades are hard to understand, and those that cost 20 bucks were impossible for me to get. But very nice game, well done!
this is an example of situation that I depend on luck, I think it would be cool to have a usable item to help me on those situations