Great game!! Thanks for making this little gem, hope you will develop it further.
Btw, there's a bug when fighting the first boss, at the beginning I use the water gem and start hacking away, strangely, for the rest of the fight the boss just sitting duck there, not attacking, doing nothing lol. Also, strangely enough, when I starting out the gem costs 500g apiece, but after buying my second or third gem, the price suddenly drops to 100g apiece.