@Sfortenn you just click and drag with your mouse...i don't know why everyone just kept voting your comments down instead of simply answering your question
to people asking for help on the bosses just get a lot of the mana pool upgrades make it so you end up with enough mana to banish the bosses like twice and you should be good im almost at the last one.
great game but i think it needs like a survival mode or something i want to get really high level gems but i can only get to like level 10 before level is over