A cute little game but with its problems. The mining gameplay, while fun, can be a bit draining after a while ( a teleport to the top would be so nice). The upgrades take a bit too long to get and the whole system of starting it is a bit clunky. It's very hard to realise that the flower requires 5 life points to grow to unlock upgrades.
Big problem with that is the text, not only does it contain many shades of grey (against the rules), its quite hard to read. Also, you are able to type into the text which I think is just an oversight. Also, the mechanic of going to the other flower to deposit your ore isn't explained, which isn't helped by the fact that your ore disappears if you go back into the other scene.
The art however, was quite good with a very defined theming, though I think the rock texture could use a few more variations. Additionally, the UI could be helped with a black border behind it, as when underground it becomes very illegible.
There are some other minor bugs and gripes, like that sometimes a block is indestructible or that you can't mine when flying.
Overall, as I said before, it's a fun game but could be improved by ironing out some of these problems