the last boss is a bit ridiculous, his spells hit you even mid roll and once he starts getting low on health he casts a spell like every 5 seconds and start doing tons more damage causing you to die with even just two spells hitting you with max upgrades and max runes. its a huge luck factor when fighting the last boss and it really is annoying. other than that it was a pretty decent game.
@Barboleta: there is a lower graphics option open up the menu and at the bottom of the scroll to the left has auto pause and on the right has a box for low quality