It's very hard to make renpy games to mobile. Like "change computer's hidden programs" type of hard. That's why you'll rarely find games that are compatible to mobile :/ Also, children don't listen to "THIS IS AN ADULT GAME" warnings and the newest generation mostly has mobiles instead of computers. Not allowing the game on mobile makes it harder for kids to play it.
Maybe when the game is fully done, a mobile version will be accessible though!