I likes minesweeper but I play them very carefully and don't have a great memory, so I rely a lot on the flags you put.
Here it's very annoying because you have to switch all the time with E. After some time I just gave up on that and didn't care as when you die, the mines are at the same spots, so it's faster to mark them.
What about, instead of switching to put flag, you have a minimap in the corner where you can directly click to put them? It would even help to see where we are while moving backward!
The second thing that made me stop playing before the end of content is the tiny but violent shake after each jump. I feel it more uncomfortable than juicy. It's not because it shakes but because how the shake is itself. I don't understand why though. Maybe have one of the ease in or ease out hard like it is now but the other smoother?
Also I am surprised the hero jumps from a tile to another. Wouldn't an animation of one big walking step (just a leg rise then lower at the end), with the same shaking, look more natural?
It's just thoughts though. This game deserved to take my time for it. ;)
The game visual are very nice and it's nice overall! :)
(Sorry for my english...)