Hi inzovu! Welcome to Piano World!
My comments would be similar to those of Bruce and Pianoloverus, but with a specific underlying reason which I will explain. Debussy was a notation stickler because he had certain effects
he wanted to hear come from the piano as part of his compositional art. Keep in mind, he was alive in that Impressionist milieu. Therefore, it is critical to examine the note values, pedal markings, dynamic markings, and all the specific notations you can see, then listen deeply into them as you play in order to hear and understand what sound
Debussy was trying to capture for you to re-create by way of his notations.
This will be difficult to do with a Casio keyboard. But, if you use your imagination you will see what I mean. Right now, because of the limitations of the Casio sound, you are relying on melody phrasing to relate the beauty of this piece. You have a very, very nice touch and good musical sensitivity. But I think you need access to a better instrument to experience my point. If you follow the instructions in this thread and get thee to a well tuned grand piano, you might just have an over-the-top epiphany as you hear the rich interplay of live harmonics undulating and shimmering around you!
Debussy knew how to play with the piano's resonance, and the best interpreters of his music (I believe you could become one) listen to re-create those effects as they play.
Thanks for sharing! Good luck with your exams.