Game does not seem to work on all Android devices.
Is there a list of hardware requirements, like amount of RAM and version of Android?
Renpy doesn't offer benchmarking tools, so if I were to guess, the minimum requirements are 100MB of RAM dedicated to HH. Enough to store 24 frames of an animation so that it doesn't stutter.
But that doesn't explain why some older phones wouldn't be able to handle it. I can't imagine any have less than 1,000MB of RAM.