Menu is quite simple, for the first time you play the game it helps you jump in tutorial directly and it teaches you about basics and heroes. There are 4 heroes, the Warrior Thor, the Elf Questor, the Wizard Merlin and the Valkyrie Thyra. All heroes have 4 abilities, left click for regular attack, right click for heavy attack, shift for a fast movement ability and space for main skill. Right click is pretty useful for all heroes, it needs time to focus but it one shots most of the time. You can spam shift ability to dodge attacks or jump in the middle of the action, it is up to you how to use this fast movement skill. Space is the best skill and we need to wait to use it again. Yes, cooldown thing!
Warrior dishes out a good amount of damage but I can’t say he is defensive, you just need to swing your axe carefully. While you focus and attack some enemies, other enemies may hit you from other sides damaging you heavily and breaking your combo chain. Whirlwind (space) ability helps a lot. Rush (shift) is good to get out of trouble or break enemy lines before attacking them.
Elf is an archer with a nice snipe skill (right click). He is very fragile so you need to use your Dash ability (shift) carefully, you can spam it but be noted that you can be attacked while you are dashing as well. Throwing bomb (space) is good to damage lots of enemies once.
Valkyrie is a strong defensive hero, she can raise her shield to avoid serious damage, she can damage several enemies throwing her shield, she is very fast. If you find it hard to play with other heroes I definitely suggest you to play with Valkyrie. she is definitely the best for beginners.
Wizard is the hardest to play among all these heroes, I could not even figure it out, you just press some buttons to change your skill set and then you use them. Wizard has more skills than other heroes but he is harder to control, you need to combine your skills carefully.
There are 5 levels and different difficulties, you are awarded if you play harder difficulties. You get more gold and you get better looking items! I played at normal difficulty and this was just for me. Of course I tried hard difficulty but it is a bit ehmm… hard…