very harsh tones, I'd be careful with dynamics. 00:09 hurt a little xd. Other than that neat test. can't wait to see what else you make :)
another comment: Hello! I think 00:05 has the same issue, but I can't remember if 00:09 was just louder. The end is also a bit loud on the ears all of a sudden. Maybe adding a sort of crescendo at the end to slowly introduce the volume change to the listener?
Other than that, everything else sounds good :)