31% bounce rate and 2 min avg play time

Running a closed beta testing for my first mobile game, it is a roguelike puzzle game, and the numbers are worrying me.

Current stats:

26% bounce rate (leaving within 30 seconds)

2m average session

27 unique players, 7 returning (31.6% return rate)

The funnel data, signal most players drop off right after the first level. They try one challenge and close.

is this normal or too low for a mobile game? if any mobile dev would love to hear your side. Thanks