Have you tried reinstalling it again without anything interfering with the internet, or without exiting Google/Chrome? Sometimes that works, or if not, try restarting your phone.
i have downloaded this twice last night, twice this morning and just right now as I'm writing this because fuck me apparently
edit: scratch that it's now seven times this morning alone
edit no.2: about eight downloads in still nothing but i feel like this time is different
edit no.3: my wifi is dying my phone is dying my mind is wasting away trying when will you be a normal download?!
edit no.4 is it going to be faster if i just uninstall the one i already have? would it matter at all!?
edit no.5: i give up
edit no.6: why do i even keep it? i don't even play it anymore
edit no.7: good news the damned thing finally downloaded, bad news i had to uninstall it first