The controls scheme is a bit weird (typically you have also SPACE as jump and AD to move to sides) but once you get used to it, it's nice. Also it's nice to know what the controls are. You could place it on your itch page (for example LEFT/RIGHT ARROW - move left/right; UP ARROW - jump).
Sometimes it was hard to time my jumps correctly because you dont get any sound or visual queue when the platform dissapears. The drops don't spawn very high. I collided with them as they were spawning multiple times. Maybe raise the area where they show up. I don't know what's the difference between green and yellow drops. I mean, they both just kill you, right?
You could also add a timer just so we would have an incentive to beat our high scores. Nice game!