Came for the beats, stayed for the hips.
Nah, but in all seriousness, nice little solo submission. It's really hard to do everything yourself, so you deserve a pat on the back for finishing in time. The sound effects are nice and the background animation is really smooth :)

Now, the critical part: First things first, the buildup, or intro before the actual game is really quite long. I thought something was not working alright, so I closed and opened again, just to realize that long time without me pressing any buttons was supposed to happen. Maybe adding some counter, or progress bar would help to suggest that the game is actually working as intended :)

The notes are in a rhythm, but it was off the music playing in the background. Synchronising the two a bit better would help a lot. Another thing is... There's not that many notes, actually. You repeat a very short sequence of notes again and again and it gets quite repetitive. Maybe adding a bunch more notes, or maybe making them a bit random would help with the game feeling repetitive.

Still, don't take my criticism too harshly, I'm not trying to point and laugh at you for being a begginer, more so trying to suggest how to get better. We're all learning here! :)