Good
I played as the wizard class and did like getting all kinds of different spells. However after the first 5 spells there didn't seem to be much point in getting more spells since you can only use 5. It would be nice if you could get more than 5 spell slots as you level up.
For my spells, I used Fireball, Fireball, Fear, Blink/Teleport, and Sleep. My technique was to cast Fireball twice, then Fear/Sleep and run away to buy some time while the Fireballs recharge. I kept Blink/Teleport for safety (wasn't really necessary since I could have used health potions instead). I actually think Blink might be better than Teleport due to its greater range.