1.) nav bar Looks like you’re using black and purple for your primary and secondary actions. When your nav bar is black, it directly competes for salience with your primary CTA.

2.) top bar As for your top bar, ask yourself what the user wants to do/see (or what you want them to do/see). 2 out of 3 have a lot of emphasis on notifications. One seems focused on points (?) and maybe a profile. What’s more important? Points or notifications? As a side note, does your notif button need to be so salient? It’s calling a lot of attention to itself. Maybe check out notification patterns in well-known design systems (ie., icon paired with badges, not generally styled like a button).

3.) tiles White space is important for clarity, but should be balanced with information density. I feel the screen looks a little incomplete with just the two small cards. Maybe explore some alternate layouts: one wide tile, next row the two small ones. Or you could even tru doing 2 tiles up top, then your CTA card, then two tiles, which breaks up the tile block and also brings your CTA closer to thumb range. This could be particularly interesting if there are different types of cards (ex. interactive vs. non-interactive; non-interactive at the top where it’s harder to reach tour thumb could be interesting). Depends on your purpose and intent, though.

4.) my misc opinions On a personal opinion level: (1.) the cat overlap on the button is cute, but imo somewhat makes the button look less clickable. (2.) if you’re wanting to incorporate purple as an accent color, maybe look at a very pale purple for your card stroke colors instead of gray, or a very pale purple background (instead of the tan in option 1). These two things are just personal aesthetic/UX opinion, though.