This game gives me some feels:
Despair! Erratic Drill + Blackout is so completely stressful. I can't even see my combo or lives, so I can lose 2-3 lives during this and not even know it.
Joy! I love getting gravity drill at the end of a level and having it clean those low hard to get places. I'm looking at you bottom-right gemstone...
OCD! For some reason playing this game really makes me want to clean under my fingernails... Weird...
Curiosity! Mina is a cute art style and the animation and voice are charming. We have an upbeat girl miner, who goes super-saiyan when she gets excited. Maybe we could learn a bit more about her, and use her unique personality and circumstances to further the plot with more levels.
Some Construction Criticism:
LOVE - Love the music and character design. Really, this has a very nostalgic feeling like old-school sega genesis games.
UI - Maybe on the main screen, after I've beaten a level, it automatically takes me to the last unlocked level so I don't have to keep scrolling down.
UI - Maybe "P" for pause, or "pause/break" or "ESC" It's less an issue on tablet, and more an issue with a keyboard mouse.
GAMEPLAY - Level 9 under the lowest group of 3 unbreakable bricks, my drill keeps getting stuck under there in an up/down motion. Pausing the game seems to reset the drill sometimes, but maybe there's a hitbox issue here. It seems the hitbox isn't "QUITE" the shape of the drill tip, rather it's more like a 7-sided box, and this points to a larger issue in the game that causes the physics and symmetry at tight spaces and corners to be off. For example where the drill comes in at 30º, it should leave at the mirrored 30º, but it will often go 45º or 90º. Get the hit box as close to circular as you can. If not, make it smaller?
GAMEPLAY - I like Erratic Drill, it's just crazy enough to add some dimension to the game. It may be benevolent and help me get a 40 brick combo, or it may see fit to end my game. It's fun, it's unpredictable. HOWEVER, we shouldn't be able to lose 2 or 3 lives from this effect. Death should spare us from this chaos.
UI - The slider to change her clothes is only visible on the loading screen very briefly. Not sure this is intentional.