Is this game optimized for mobile & mobile revenue?

Hey everybody antiael here, I’ve got a new game that works on all platforms but I’ve noticed that on Mobile the revenue and playtimes are lower.

Conversion rates for Platforms
Xbox 1.2
PC 1.00
Tablet 0.61
Phone 0.54

The playtimes for mobile are about 2-3 minutes lower, but that’s to be expected. The overall playtime is still around 15 minutes, so I’m certainly not dying out here.

My question, for those who have made mobile/play mobile, is there something inherently wrong with my game? Do mobile players just not spend as much money, or is my game not OPTIMIZED for mobile? All suggestions for a better mobile experience welcome.

Game: