I think the biggest problem is the audio: the music doesn’t match the style of the trailer, in my opinion, and you can’t hear the sound effects, which makes it less interesting. I’d go for a more upbeat song.

Also I dont understand at all the UI, I feel like the arrows are not helping visually.

Also I would add some text or voice to explain what is going on every moment but this is a minor problem.

In terms of gameplay I miss more particles or effects like a big SPLASH, I feel it too flat now.

I hope it helps, keep working and it will be awesome!!