My game - Movement battle - collect ideas

Hi Everybody!

I have created this game:
https://apps.garmin.com/en-US/apps/9572e45d-2fb7-4003-9029-d7881c319037

And I would like collect ideas, how can I make it even better?

Or It is absolutely not interest?

I have a plan now:
Collect "step" separately, and spend it when you want. Not like now, spend all of them automatic when you enter to app.

Thank you for your advice!