oh now after reading your explanation of the gameplay two posts above i get it :) at first i though i had to drill the notes in the order they changed on the bottom of the screen xD
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No problem I've been working on a updated version with better background easier tutorial and over all added aesthetic with 2D lighting even tough it's subtle and the most important thing of all I added or better removed that you have to click on the "button" to make the sound, you're just able to drill and the note will appear automatically. I will update the game as soon as the rating period is over.