Frustrating bug: When playing cards that allow you to choose between gaining ore or scorium, you can only choose between gaining resources you have in your hand. Or if that is the intended functionality, it should say that on the card.
Also, Jerboa should make it clear it upgrades a random card in your hand; from reading the card I expected to choose, even though that would be OP. Likewise the word 'Place' in pet mole card text makes it sound like you get to choose the cards you draw. "Draw up to 3 resource cards from the draw pile" might be clearer.
Another point which is an improvement rather than a bugfix(let me know if there's a better place to submit bugfix and feature requests): it would be nice if the ending stats showed excess scorium on each level, since lower on the earlier levels but greater on level 10 seems the ideal aim.
These are minor issues with clarity of card text though, overall the game is fantastic!