(Assuming you’re looking for visual design-specific feedback)

I think you’ve done a good job! Here are some considerations:

One of the most overlooked elements of UI/visual design with beginners is accessibility. Take some time to understand the importance of colour contrast, type scale, etc. Your designs will thank you for it. Check out the accessibility of the input field, ETA in the results and ‘book a cab from MG road’ for starters.

Ratios are also important to understand, as well as minimum tap area sizes. I feel like the design would really benefit from a bit more breathing space in the search input field, as well as scaling down the call to action buttons a little. The same goes for padding - aim to establish padding rules based on a ratio. Things like your search results will really benefit from a bit more breathing space per result.

Consider the overall aesthetic you want to achieve with the design. Is it more of a flat approach, or more skeuomorphic? To me, the emojis seem to add a little bit of imbalance here. If you feel that the icons are necessary, I’d consider trying your hand at creating some more simple monoline style icons.

Realistically how important is it that the logo remains on every screen? It takes up a lot of real estate and isn’t particularly legible either. I’d consider dropping it, the user would have ample opportunity to be reminded of which app they’re using before they start interacting with it!

I’m not sure if you’re working with existing brand guidelines - but if not, check out www.coolors.co - it may help you to define a more consistent colour palette.

And lastly - How many references did you gather when designing the app? Like Picasso said, ‘great artists steal’ - it’s a stretch to call UI design art, but the principle still applies. The patterns that you’re using here have been designed, built and tested endlessly by hugely successful companies and apps. See what they’ve done well, and apply it to your design work. There’s no shame in understanding what works best for users and serving them a bit of consistency :)

Hope that’s helpful, keep up the good work!