Glad you like the game so far!
I could add a sort of dictionary to the game, where you can go through all the keywords. Would that help?
"Steal lacrima" lets you steal the lacrima (= the gems on the cards) from your enemy, or the enemy can also steal them from your cards.
Preventing right-click sounds like a good idea. In most cases you can click the shop icon again after leaving, but I will make it so you have to actively click the button to leave.
Thanks for your feedback!