Pretty good. My biggest problem with it is that one of the combos is overpowered. It's the one where you press D twice and then hold it. This combo results in me just standing there infinitely spamming a stab attack. The problem with this move is that it's infinite. The character never seems to stop unless I make them, most enemies get trapped by it and take damage until they die, and you're invincible while you do it. During the first four levels I just used that move when ever I approached a new group of enemies and they'd walk right into, being stunned and damaged repeatedly. I was happy to find that the large, horned skeleton introduced on level 5 didn't get stunned, but when it tried attacking me while I was doing the move I found that it couldn't hurt me. I played up until I got to the volcano and then I stopped because it got boring.
I'd recommend changing this move some, like have the character stop after a set amount of time ( and possibly make them out of breath, leaving them open to an attack themself) and making it so they can be knocked out of this attack. Because, as it is, this move breaks the game and eliminates the challenge.