Such a cool game!! Really love the graphics and the game design. Having the sniff feature is super super useful without being overpowered, letting you know if there's a point in clearing out an area or just moving forwards. The collections feature gives decent replayability. Also really like having multiple lives, it makes it way less frustrating to make a mistake.
Got constructive criticism but this is a years old game so I'm not expecting it to be updated, just thought I'd mention it anyway :3
I gotta say the noise for hitting a rock is SO loud and sharp it genuinely makes me jump out of my skin. Though that could just be me having sensory issues to be fair. Either way being able to turn it down would be useful, as it is you can only turn all the sound effects off which would mean no digging or treasure noise :c It'd just be the music, which speaking of, does get pretty repetitive. Having it change every few levels does help a little with that though.
Also could benefit from being able to hold to move over empty areas. I get needing to tap for digging so you don't accidentally piledrive directly into a boulder lol, but for the open tiles it feels redundant and slows you down a fair bit when navigating entirely safe areas (like going up and around a mound of dirt to navigate from the opposite side)
A way to instantly restart would also be helpful, like if you make a dumb mistake really early on being able to instantly exit and try again would be easier than having to purposefully find and run into boulders (my poor mole guy is a trooper)
Most of that is fairly minor to be honest, the only 'real' issue is the rock noise cuz it makes me jump so hard every time >.< When I know it's coming it's fine but as a surprise,,,ough. Scari
But yeah overall I do really like this, especially the visuals that's probably it's strongest point, with the gameplay design coming in close second :D (And the mole family is SO cute tbh they get honorary 1st place for features)