At first glance, since I'm not used to this kind of game it was a bit confusing. I got that the keys had to be on the drums but was distracted with the light and bright elements of the screen. Also the goblins, and overall looking at the art of the game wich is really smooth.

Then I've played a second time, this time looking at the bottom, guessed i had to click where the arrows were so the better they matched, the better the score, also, the music really adds to the game and does not feel repetitive at all.

There is only one thing that i would improve, and that would be the visual feedback of the inputs.  It felt a bit lacking in there to me due to the text and having a small screen. I think a sprite that expands in size (from the drum) when a input have been made properly would've given it a better feedback for the player (in example a circle with the color of perfect/good/bad).

This is a great game, and well polished overall. I've enjoyed playing it, great job guys :D

Nice game, funny and enjoyable.