Congrats on the launch. The solution looks much simpler than https://www.angaza.com/ I guess. That said, angaza does a lot more than just offline keycode based payments. Do you plan to do similar things as well or stick to core payments experience?
I'd like to see a video or a how-to page, to be honest, that sells the simplicity... like one on angaza [0] but I'm not your target user by any stretch of imagination.
I do have some qualms around claims in the security section like
"Verified by Google APIs"
"Bank Grade Security"
"Your mobile PIN travels through your telecom's encrypted network"
"Create a NALA PIN in addition to mobile money PIN"
It'd not hurt to detail these claims in a more digestible manner instead of what looks like hand-wavvy sales checklist? Again, I'm not your target user.
[0] https://www.angaza.com/2019/02/25/pay-as-you-go-keycode/