I believe if I'm not mistaken, once the apk file is downloaded onto your Android device. You should be able to find a icon for the game where your recent apps download to and tapping on it will load the game up. ^^ (Within the next update or two, we'll going to update the game app/program icon so it stands out better too.)
Viewing post in Messy Academy (abdl diaper vn) v0.20 pt 1 & 2 comments
Sorry about my earlier message. >.< Okay, so I tried downloading it for myself and this is what my steps were. Hopefully this helps!
1. Click Download Now button on the itch page.
2. "No thanks, just take me to the downloads" click.
3. Click Download button above "Messy Academy v0.18 Android 193MB"
4. "Do you want to download android.messyacademy-18-universal-release.apk?" (For me it asked "again" cause I tried doing it once.)
5. Click Download. (It'll say downloading, along with "details" next to it.)
6. Download finishes. "android.messyacademy-18-universal-release.apk." (Open), Tap on the Open link/Button.
7. Should pop up a notification. (Messy Academy, shows Ren'py icon) "Do you want to install an update to this existing application? Your existing data will not be lost." Or "Do you want to install, etc." Tap on (Install) Button/link.
8. It will begin installing and then it'll say on the same notification popup. "App installed." (Done) or (Open) tap on the Open button/link.
9. The game should launch to the title screen, enjoy! ^^
(For later when you close out of the game app after all of this. You should be able to now find the Messy Academy app located where your other unorganized apps are located. It'll have the same Ren'py icon seen from the above process until we update said icon in the next coming updates.)