If you search Google Play and it won't show up in the results it won't work on your device. You can find it on your pc and try to send it to yourself but you should get a message that it isn't compatible with your device when it asks you to log in. Not every app works on every device. There may be an issue with compatibility between the OS and the app or the device and the app and usually GP will catch this compatibility issue and exclude it from your search results and give you a warning if you attempt to download it to your device. If the dev is still active you can notify them of your issue and see if they will address it in the next version. They may also offer beta testing if you visit their site or ask which may also allow you to have it while they continue to write code.
GL